GLASS II. 

 ENDOGENS OR MONOCOTYLEDONS. 



Stems with.no manifest distinction into bark, wood, and 

 pith ; but the woedy fibre and vessels collected into bundles 

 or threads which are irregularly imbedded in the cellular 

 tissue : perennial trunks destitute of annual layers, increas- 

 ing by internal accretions. Leaves mostly parallel-veined 

 (nerved) and sheathing at the base, seldom seperating by an 

 articulation, alternate, entire. Flowers commonly. in threes-.. 

 Embryo with a single cotyledons (orif two they are alternate).. 



&ub*olass IIL AGLUMACEOUS ENDOGENS. 



Plants of the endogenous structure, with flowers coi>- 

 »tructed on the usual plan ; perianth vertieillate, consisting, 

 of One or more whorls of petaloid organs, or wanting. 



Order. 111. ARACEiE — Arum Family. 



Plants wdJi acrid or pungent juice, simple or: compoxi'rul often veiny leaves, and 

 monoecious or perfect flowers crowded on a spadix, which is usually surrcuvAtd og & 

 tpatht. Floral envelopes none, or of 4 to 6 sepals. Fruit usually a berry. 



1. ARUM, Linn. Indian Turnip. 



The ancient name, of unknown meaning. 



Flowers monoecious, the upper sterile and the lower fer- 

 tile, or sometimes polygamous dioecious, on the base of an 

 elongated spadix, surrounded by a hooded spathe, convolute 

 at base. Perianth none. Anthers orowded and some- 

 what whorled on the spadix, nearly sessile. Berry 1-celled, 

 many-seeded. — Low perennial herbs, with a tuberous rootstoch 

 er corm, sending up a simple scape, sheathed with the petioles of the 

 timple or compound veiny leaves. 



1. A. TRiPHYLLUxM, L. Indian Turnip. Jack-in-the- Pulpit. 



Leaves mostly 2, divided ! into 3 elliptical-ovate pointed leaflets-; spadix club- 

 ahaped, obtuse, much shorter than the cpathe ; spathe ovate, acuminate, flat anc". 

 deflected above. 



Rich moist woods, common. May. Corm turnip-shaped, wrinkled, with an in- 

 tensely acrid juice. Leaves 2 to 7 inches long, % as wide, smooth. Spathe with tho 

 petioles and sheaths green, or frequently variegated with dark and whitish stripes^ 

 ar spots. Berries bright scarlet,, in a dense head, ripe in autumn. 



