=A. canescens= (hoary).* The Lead Plant. _fl._ dark blue. July. _l._, leaflets ovate-elliptic, mucronate. _h._ 3ft. Missouri, 1812. Whole plant clothed with hoary hairs.
=A. fruticosa= (shrubby).* The False Indigo. _fl._ very dark bluish purple. June. _l._, leaflets elliptic-oblong; lower ones distant from the stem. _h._ 6ft. Carolina, 1724. Shrub glabrous, or a little villous. There are several varieties, having mucronate, emarginate, or narrower leaflets, but all with purple flowers. A host of names, representing the merest forms of _A. fruticosa_, are to be found in nurserymen's catalogues. Amongst them are: _caroliniana_, _crocea_, _crocea-lanata_, _dealbata_, _fragrans_, _glabra_, _herbacea_, _nana_, _pubescens_, &c. These differ so slightly from the type and from each other, that it is impossible to distinguish them.
=AMORPHOPHALLUS= (from _amorphos_, deformed, and _phallos_, a mace; alluding to the inflorescence). SYN. _Pythion_. Including _Proteinophallus_. ORD. _Aroideæ (Araceæ)_. A very remarkable genus, closely allied to _Arum_, but distinguished therefrom by "their spreading, not convolute, spathes; by their anthers opening by pores, not by longitudinal slits; by the numerous cells to the ovary; and by the solitary, erect ovules, those of _Arum_ being horizontal." A soil consisting of two-thirds good rich loam, with the additional third of sweet manure, thoroughly rotted, suits them well. Other essentials are plenty of pot room, a genial atmosphere, and a temperature ranging from 55deg. to 65deg., or even 70deg. They require to be kept dry, and warm in winter, as nothing is more fatal to them than cold or damp. Beneath a shelf or stage in the stove is an excellent spot for them, or they may be stored in sand, and kept free from frost. They are difficult to increase; the corms of most of them are of great size, and rarely make offsets. Efforts should consequently be made to induce the plants to seed whenever practicable. All the species are strikingly effective in sub-tropical bedding. For fertilising and growth of seedlings, _see_ =Arum=.
=A. campanulatus= (bell-shaped).* Similar to _A. Rivieri_, but the flowers are brown, red, and black, and the scape is neither so stout nor so tall. _h._ 2ft. India, 1817. SYN. _Arum campanulatum_.