by Nathaniel Lord Britton & Addison Brown

Name: An Illustrated Flora of the Northern United States, Canada and the British Possessions — second editionGeneral Key to the Orders and Families
Author: by Nathaniel Lord Britton & Addison Brown

An Illustrated Flora of the Northern United States… (1913)

Summary

“An Illustrated Flora of the Northern United States, Canada and the British Possessions — second editionGeneral Key to the Orders and Families”, published in 1913, is a work by by Nathaniel Lord Britton & Addison Brown. It explores elements such as corolla, Stamens and sporanges.

Quotes from An Illustrated Flora of the Northern United States… (by Nathaniel Lord Britton & Addison Brown)

by Nathaniel Lord Britton & Addison Brown, An Illustrated Flora of the Northern United States… (1913)

“ Spores developing into flat or irregular prothallia, which bear the reproductive organs (antheridia and archegonia) ; flowers and seeds none. 1. Spores produced in sporanges, which are borne on the back of a leaf, in spikes or panicles, or in special conceptacles. Order 1. Filicales. Spores all of one sort and size (isosporous families) . Vernation erect or inclined; sporanges in spikes, or panicles, opening by a transverse slit. Fam. 1. Ophioglossaceae. Vernation coiled; sporanges reticulated, usually provided with a ring (annulus) . ”

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Source: Wikisource

by Nathaniel Lord Britton & Addison Brown, An Illustrated Flora of the Northern United States… (1913)

“ Stamens as many as the corolla-lobes. Leaves always stipulate, usually blackening in drying. Fam. 36. Rubiaceae. Leaves usually exstipulate, not blackening in drying. Fam. 37. Caprifoliaceae. Stamens twice as many as the corolla-lobes; low herb with ternately divided leaves. Fam. 38. Adoxaceae. Stamens mostly fewer than the corolla-lobes; ovary 1-celled with 1 pendulous ovule, or 3-celled with 2 of the cavities without ovules. ”

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Source: Wikisource

by Nathaniel Lord Britton & Addison Brown, An Illustrated Flora of the Northern United States… (1913)

“ Capsule mostly septicidal; plants rarely bulbous. Fam. 21. Melanthaceae. Capsule loculicidal (septicidal in Calochortus) ; plants mostly bulbous. Fam. 22. Liliaceae. Fruit a fleshy berry (except in Uvularia of the Convallariaceae) . Erect herbs; tendrils none; flowers perfect. Leaves basal or alternate. Fam. 23. Convallariaceae. Leaves verticillate. Fam. 24. Trilliaceae. Vines, climbing by tendrils, or rarely erect ; flowers dioecious, in axillary umbels. Fam. 25. Smilaceae. b. Ovary inferior, wholly or in part. Stamens 3, opposite the inner corolla-segments. ”

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Source: Wikisource

by Nathaniel Lord Britton & Addison Brown, An Illustrated Flora of the Northern United States… (1913)

“ Embryo with 1 cotyledon; stem with no distinction into pith, wood and bark; leaves mostly parallel-veined.
1. Carpels 1, or more, distinct (united, at least partially, in Family 6, Scheuchzeriaceae, where they are mostly united until maturity, and Family 8, Vallisneriaceae, aquatic herbs, with monoecious or dioecious flowers) ; parts of the flowers mostly unequal in number. Inflorescence various, not a true spadix. Flowers not in the axils of dry chaffy scales (glumes) ; our species aquatic or marsh plants. Endosperm mealy or fleshy; perianth of bristles or chaffy scales ”

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Source: Wikisource

by Nathaniel Lord Britton & Addison Brown, An Illustrated Flora of the Northern United States… (1913)

“ Flowers regular; fertile stamens 5 (4 in Petunia) ; fruit a berry or capsule. Fam. 27. Solanaceae. Flowers more or less irregular; fertile stamens 2 or 4 (5 in Verbascum) ; fruit a capsule. Fam. 28. Scrophulariaceae. Ovary 1-celled; marsh or aquatic herbs with flowers on scapes. Fam. 29. Lentibulariaceae. Placentae parietal. Herbs, parasitic on the roots of other plants, the leaves reduced to scales, not green; ovary 1-celled. Fam. 30. Orobanchaceae. Trees, vines, shrubs, or herbs, the foliage normal. Trees, shrubs, or woody vines; capsule 2-celled; seeds winged in our genera. ”

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Source: Wikisource

by Nathaniel Lord Britton & Addison Brown, An Illustrated Flora of the Northern United States… (1913)

“ Sporanges opening vertically. Sporanges panicled, with a rudimentary ring; marsh ferns. Fam. 2. Osmundaceae. Sporanges sessile on a filiform receptacle; leaves filmy, translucent. Fam. 3. Hymenophyllaceae. Sporanges ovoid, in panicles, or spikes, provided with an apical ring. Fam. 4. Schizaeaceae. Sporanges opening transversely, provided with a vertical ring; borne in sori on the back or margin of a leaf. Fam. 5. Polypodiaceae. Spores of two sizes (microspores and macrospores) . Plants rooting in the mud; leaves 4-foliolate, or filiform. Fam.6. Marsileaceae. Plants floating ”

by Nathaniel Lord Britton & Addison Brown

Summary

Quotes from An Illustrated Flora of the Northern United States… (by Nathaniel Lord Britton & Addison Brown)

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