Text-book of structural and physiological botany . Fig. 146.—Lathyrus Aphaca ; r tendril;b flower ;/fruit; 7i stipule. Fig. 147.—Leaf of grass ; Lig. ligule ;L lamina ; G leaf-sheath. the upper leaves are the only part to expand, the leaf itselfdegenerating into a tendril. The stipules of the gooseberryand common ^ acacia, Robinia pseiidacacia{¥\g, 184, p. 103),are spinous ; they are leaf-like and persistent in the pea,membranous and deciduous in the oak and beech. ^ Underthe head of stipules come the ligtdes (Figs. 142, 147), ordelicate appendages which grow at the point of union oflamina and
Text-book of structural and physiological botany . Fig. 146.—Lathyrus Aphaca ; r tendril;b flower ;/fruit; 7i stipule. Fig. 147.—Leaf of grass ; Lig. ligule ;L lamina ; G leaf-sheath. the upper leaves are the only part to expand, the leaf itselfdegenerating into a tendril. The stipules of the gooseberryand common ^ acacia, Robinia pseiidacacia{¥\g, 184, p. 103),are spinous ; they are leaf-like and persistent in the pea,membranous and deciduous in the oak and beech. ^ Underthe head of stipules come the ligtdes (Figs. 142, 147), ordelicate appendages which grow at the point of union oflamina and sheath in the leaves of grasses. Sessile leaves sometimes partly or entirely embrace thestem, and are then amplexicaid^ or semi-amplexicaul. In theformer case the base is occasionally developed in a sheath-like ^ [In pinnate leaves, each of the petiolules or separate petiolesof the leaflets is sometimes furnished at its base with a secondary sti-pule or stipella.—Ed.] The External Form of Plants, 93 form, sometimes not, as in the common b
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Keywords: ., bookcentury1800, bookdecade1870, bookpublishernewyorkjwileysons
