Rubiaceae

“ But an immense lapse of time will have been necessary in all such cases for the modified descendants of a common progenitor to have spread from a single centre to such widely remote and separated areas. The family of the Rubiaceae contains not far short of as many heterostyled genera as all the other thirteen families together; and hereafter no doubt other Rubiaceous genera will be found to be heterostyled, although a large majority are homostyled. Several closely allied genera in this family probably owe their heterostyled structure to descent in common ”

“ This shrub, belonging to the family of the Rubiaceæ, is wild in Abyssinia,2069 in the Soudan,2070 and on the coasts of Guinea and Mozambique.2071 Perhaps in these latter localities, so far removed from the centre, it may be naturalized from cultivation. No one has yet found it in Arabia, but this may be explained by the difficulty of penetrating into the interior of the country. If it is discovered there it will be hard to prove it wild, for the seeds, which soon lose their faculty of germinating, often spring up round the plantations and naturalize the species. ”

“ The whole case is perplexing in the highest degree, and will not be understood until experiments are tried on living plants. The greater length, and more papillose condition of the stigma in the short-styled than in the long-styled flowers, looks as if the plant was heterostyled; for we know that with some species—for instance, Leucosmia and certain Rubiaceae—the stigma is longer and more papillose in the short-styled form, though the reverse of this holds good in Gilia, a member of the same family with Phlox. ”

“ Rubiaceæ, forms with Apocineæ, Asclepiadeæ and certain genera referred to Gentianeæ, a great natural class, 36; observations on the order and on its distribution in Terra Australis, 36; on the division of the order, and on the species found in the vicinity of the Congo, 130-2; proportions of the order and of its principal divisions in various countries, 130—1; new genera of, found in the vicinitv of the Congo, ibid.; species found in Central Africa, 295
Ryania referred to Passifloreæ, 121 ”

“ When we consider how, as we extend our knowledge of the same plant over a wider area, new geographical varieties commonly present themselves, and then endeavour to imagine the number of forms of the genus Rubus which may now exist, or probably have existed, in Europe and in regions intervening between Europe and Australia, comprehending all which may have flourished in Tertiary and Post-Tertiary periods, we shall perceive how little stress should be laid on arguments founded on the assumed absence of missing links in the flora as it now exists. ”

“ Botanists and Gardeners have given to this species of Rubus the name of flowering, not because it is the only one which produces flowers, but from its being regarded for its flowers merely; they indeed are so shewy, and so plentifully produced, that the plant has long been thought to merit a place in most shrubberies; to the various inhabitants of which, both in the largeness and elegant form of its leaves, and the colour of its blossoms, it forms a pleasing contrast. ”

“ As in Salix daphnoides, the bark is covered with the waxy secretion known as 'bloom,' and of a blue-tinted white. Some six or seven species of Rubus have this character. Of those obtainable from nurseries, R. biflorus, a Himalayan species often to be had from dealers under the erroneous name of Rubus leucodermis, is the best. Dr. A. Henry has introduced a Chinese species, Rubus lasiostylus, which is even better than biflorus; the bloom is more distinctly blue, and the stems sturdier and more self-supporting. The species is, however, an extremely rare one in cultivation. ”

“ Petals 5, crumpled in the bud, fugacious. Styles short or none in our species; stigma 3-lobed. Capsule strictly 1-celled. Embryo curved in the form of a hook or ring.—Flowers in most N. American species of two sorts, viz., primary or earlier ones, with large petals, indefinitely numerous stamens and many-seeded pods; and secondary, or later ones, which are much smaller and in clusters, with small petals or none, 3–10 stamens, and much smaller 3–few-seeded pods. The yellow flowers open only once, in sunshine, and cast their petals by the next day. ”

“ Rubus.—This genus includes the Blackberry and Raspberry, and in a modified form the treatment accorded to them for fruiting is the best to employ with the ornamental Rubi, that is, all old wood that has flowered should be cut away and strong young canes encouraged. But while in the cultivation of the Raspberry only a few young canes are allowed to grow, in the ornamental species practically every young growth should be utilised. The double-flowered Rubi should have some of the old wood left, as they do not make so much young growth as the single ones do. ”

“ Clean Weeding.—Intimately connected with the growth and development of the rubber tree one has to consider the conditions under which it is allowed to mature. The argument has been used that, since the habitat of Hevea Brasiliensis is in the jungle, we should be proceeding against nature by introducing conditions unlike those under which the “wild” rubber tree grows. It is difficult to treat such an argument seriously, as by quoting parallel instances in arboriculture it could be shown that growth, development, and yields are improved by cultivation of “wild” plants. ”

“ In these luxuriant years the plants grew as thick as sedges and bulrushes in their beds, and were taller than usual, attaining a height of about ten feet. The wonder was to see a plant which throws out leaves as large as those of the rhubarb, with its stems so close together as to be almost touching. Standing among the thistles in the growing season one could in a sense hear them growing, as the huge leaves freed themselves with a jerk from a cramped position, producing a crackling sound. ”

“ The seedlings of this composite Rubus (named Primus) , though a most perfect blend of both parents but resembling neither, never reverted either way; all the seedlings coming much more exactly like the new type than do the seedlings of any ordinary wild rubus. Many thousand plants have been raised generation after generation, all repeating themselves after the new and unique type. No botanist on earth could do otherwise than classify it if found wild as a valid new species, which it truly is, though so summarily produced by crossing. ”

“ The rubber requires—and deserves—a good rich soil, and in the spring, summer and fall, all the water that the soil will keep absorbed. Give less in winter, as an excess at this time causes the leaves to turn yellow and droop.
As the rubber is more difficult to propagate than most house plants, and specimens will not get too large for several years, it will be best to get plants from the florist. It frequently happens, however, that an old plant which has been grown up to a single stem, becomes unwieldy, and bare at the bottom. ”

“ Of the Rubi, another intricate family, we have but six shrubby species, Rubus idaeus, R. suberectus, R. caesius, R. fructicosus, R. corylifolius, and R. glandulosus, and in determining these, there can be no difficulty, unless we attempt to divide them into the endless varieties dignified by specific names by some German Botanists. For one well defined Bramble, very common in the vales of the Highlands of Scotland and Cumberland, we have but a single locality at present, though I think it must have been overlooked in our sub-alpine vallies, among the Cheviot mountains ”

“ Stamens distinct; the oblong or linear anthers sheltered under the overarching petal-like stigmas (or rather branches of the style, bearing the true stigma in the form of a thin lip or plate under the apex) ; most of the style connate with the tube of the perianth. Capsule 3–6-angled, coriaceous. Seeds depressed-flattened, usually in 2 rows in each cell.—Perennials, with sword-shaped or grassy leaves, and large showy flowers; ours with creeping and more or less tuberous rootstocks. (Ἶρις, the rainbow, anciently applied to this genus on account of its bright and varied colors.) ”

“ Its beautiful variegation is reproduced true from seed, and it is almost an indispensable plant in the flower-garden, not growing so vigorously as the green kinds. It is particularly useful for intermingling with arrangements of ordinary bedding-plants,{217} for vases, the outer margins of beds of subtropical plants, and like positions, where its variegation may be well seen, and where its graceful leaves will prove effective among subjects of dumpy habit. It should in all cases have light, rich, warm soil. It has a habit of breaking into shoots rather freely near the base of the central stem ”

“ The large leaves have their veins red, which distinguishes it from any other species. It has a large and deep-feeding root, black on the outside, and yellow within. The flowers are very small, of a yellowish white. It comes up somewhat later than the common kinds, and is not by any means common, though it may be found in botanic gardens and nurseries where collections of herbaceous plants are formed. It may, like all the species, be increased by division, but a young plant should not be disturbed for several years after being planted. ”

“ Groups of botanists, chemists and arboriculturists study constantly tree diseases, methods of increasing the yield, and the other problems of growing fine trees that will produce high grade rubber. Here, by experiment and inspection, the secrets of the rubber tree are being brought to light, so much so that growers look to this plantation for leadership in methods of rubber culture. This great project so far from American soil and in a field so new gives a thrill of pride to the Americans visiting Sumatra on their way around the world. ”

“ When the seeds are ready to drop the outer covering of the pod bursts with a loud report, the seeds shooting in all directions.
This is Nature's clever scheme to spread the Hevea family. The tree grows wild in the hot, damp forests of the Amazon valley and in other parts of South America that have a similar climate. The ideal climate for the rubber tree is one which is uniform all the year round, from eighty-nine to ninety-four degrees at noon, and riot lower than seventy degrees at night. ”

“ Rhubarb, Rheum.—There are several species of rhubarb in cultivation in addition to those commonly grown in gardens. They are much alike in port and in the size of their leaves, R. palmatum and Emodi being the most distinct. The rhubarbs are fine things for association with large–leaved herbaceous plants in deep soils.
Rose, Rosa.—As in the case of brambles, we have many more kinds of wild roses in England than is commonly supposed, but of course nobody ever thinks of planting such things in gardens or shrubberies, where such gems as privet [156] usually make up the underwood. ”

“ V. Genus; VI. Species.
To illustrate: The white pine belongs to the highest great division (sub-kingdom) of the plant kingdom. The plants of this division all produce seeds, and hence are called “spermaphytes” (“seed plants”) . They may be divided into two groups (classes) , distinguished by certain peculiarities in the flowers and seeds. These are named respectively “gymnosperms” and “angiosperms,” and to the first our plant belongs. The gymnosperms may be further divided into several subordinate groups (orders) , one of which, the conifers, or cone-bearing evergreens, includes our plant. ”

“ Embryo thread-shaped, spirally coiled in the rather fleshy albumen, destitute of cotyledons, sometimes with a few alternate scales (belonging to the plumule) ; germination occurring in the soil.—Leafless annual herbs, with thread-like yellowish or reddish stems, bearing a few minute scales in place of leaves; on rising from the ground becoming entirely parasitic on the bark of herbs and shrubs on which they twine, and to which they adhere by means of suckers developed on the surface in contact. Flowers small, cymose-clustered, mostly white; usually produced late in summer and in autumn. ”

“ From their situation they are out of ordinary sight; but they will well repay examination. For the vegetation that is carried on under ground is hardly less varied or important than that above ground. All their forms may be referred to four principal kinds: namely, the Rhizoma (Rhizome) or Rootstock, the Tuber, the Corm or solid bulb, and the true Bulb.
Fig. 97. Rootstocks, or creeping subterranean branches, of the Peppermint.
104. The Rootstock, or Rhizoma, in its simplest form, is merely a creeping stem or branch growing beneath the surface of the soil, or partly covered by it. ”

“ The usual method of planting rhubarb is to set the plants in a single row along the garden fence, and the hills should be about 4 feet apart. If more than one row is planted the hills should be 31⁄2 or 4 feet each way. The thick leaf stems are the part used, and none should be pulled from the plants the first year after setting. Rhubarb should receive the same treatment during winter as asparagus, and the plants should never be allowed to ripen seed. ”

“ As the nourishing fluids pass more rapidly along these vascular bundles, the leaf naturally grows there more rapidly, and thus assumes the lobed form, with a vein running to the point of each lobe.
On the whole, we see, I think, that many at any rate of the forms presented by leaves have reference to the conditions and requirements of the plant. If there was some definite form told off for each species, then, surely, a similar rule ought to hold good for each genus. The species of a genus might well differ more from one another than the varieties of any particular species ”