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Memoirs of the Torrey Botanical Club (Volume 13) Torrey Botanical Club

Memoirs of the Torrey Botanical Club (Volume 13)

Torrey Botanical Club

Published December 28th 2009
ISBN : 9781150361753
Paperback
300 pages
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 About the Book 

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1906. Excerpt: ... Petioles usually shorter than half theMoreThis historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1906. Excerpt: ... Petioles usually shorter than half the leaf-breadth. Veins slender, cord-like beneath, impressed above or slightly elevated when dry. Obvious hair absent, and but little to be found by lens except on pedicels. Branches numerous, long, rigid, ascending in straight or irregularly slight sinuous lines, each branch very loosely corymbose or in larger plants pinnately branched with corymbs on the branchlets only. Inflorescence in well-developed plants paniculately decompound, very profuse, strongly pinnate in effect on pressing- the panicle often somewhat urceolate by outcurve at the base of uprising branches. Still stronger plants rise higher, the inflorescence forming 3 of the plant or more- and assuming an elliptic or oblong form, more than 2 x 1 ft. long- of its dozen branches several becoming as much as 20 in. long. Pedicels (ultimate branchlets) filiform, stiff, 1 in. or y2 in. long, either with subtending linear or discule bractlets, and divaricate widely or slightly according to number, their bases usually corymbosely separated, not umbelliform or subradiate as often in A. Claytoni. Heads very small, about $i in. broad, in. high, the involucre when dry being-or in less floriferous plants all heads may be larger, in. high, 3 in. broad, etc. Involucre narrowly urceolate, contracted above during early flower, appearing as if pinched together just before the expanding summit, as also to some degree in A. Claytoni. Bracts in general character lingual, very broad, rounded and scale-like, very uniform, with little herbaceous or green growth, reddened, especially at the edges, or straw-color throughout, with but slight ciliation, otherwise smooth- the pale green midrib abruptly terminated by a broad shallow inconspicuous crescentic green tip, absent from the i...