Pinnule

Definition and stakes

S. Leonard Bastin,  How to Know the Ferns

“ The stipes is somewhat longer than the rachis, and it is of a whity-green colour. The outline of the barren frond is roughly triangular, the apex of the leaf being rather blunt. The pinnæ are placed alternately on either side of the main stem, and these bear pinnules which [45] have their margins deeply cut. In very large specimens the fronds may be divided three times. The barren fronds grow on the outside of the tuft. The fertile frond is somewhat taller than the barren leaf, to which it bears a resemblance in its general form. The pinnæ, of course, are very much restricted. ”
Source: Gutenberg

George Henry Tilton,  The Fern Lover's Companion

“ In the east it is often dwarfed--six to ten inches high, growing in tufts with stout rootstocks, having the pinnules finely toothed instead of rounded and the indusia often lunate, rarely twice as long as broad. (Fernald in Rhodora, November, 1905.) Also found in northern Vermont, and to the northwestward.
(2) THE VENUS-HAIR FERN. Adiantum Capíllus-Veneris
Fronds with a continuous main rachis, ovate-lanceolate, twice pinnate below. Pinnules, fan-shaped on slender, black stalks, long, deeply and irregularly incised. Veins extending from the base of the pinnules like the ribs of a fan.
”
Source: Gutenberg

The Orange Fairy Book

“ But Pinkel has a smooth tongue, and he can get the better of any woman, old or young.’
‘Then bid him go this very night,’ cried the king; ‘and if he brings me the lantern I will make him one of the chief men about my person.’
Pinkel was much pleased at the thought of his adventure, and without more ado he borrowed a little boat which lay moored to the shore, and rowed over to the island at once. It was late by the time he arrived, and almost dark, but he knew by the savoury smell that reached him that the witch was cooking her supper.
”
Source: Gutenberg

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