522 FLORA OF TEXAS. 



somewhat glaucous, 3°-4° high; spadix 6-12' long; par- 

 tial spatlies none; drupe 6"-9" long. 



127. ARUM FAMILY. Order, Aeace^. 



Acrid chiefly stemless herbs, from tuberous or creeping 

 rootstocks, with entire or divided often veiny leaves, and 

 perfect or monoecious floivers, borne on a spadix, and com- 

 monly inclosed in a spathe ; calyx and corolla wanting, or 

 the former with scale-like sepals ; stamens short, hypogy- 

 nous; anthers extrorse, commonly sunk in the thick con- 

 nective; ovary 1-several-celled, with 1-several ovules in 

 each cell ; stigma sessile ; fruit fleshy, indehiscent ; embryo 

 straight ; albumen mealy or fleshy, sometimes wanting. 



SYNOPSIS. 



* Calyx and corolla none ; spadix inclosed in a spathe ; flowers monoecious. 

 t Fertile flowers numerous ; spadix free. 



Spatha thin, convolute at the base, arching above. Spadix barren above. Leaves 3-seve- 

 ral-lobed Abisjema. 



Spatha green, thick, convolute throughout, wavy on the margin. Spadix flowering 

 throughout. Leaves sagittcUe Peltaksba. 



+t Fertile flowers solitary ; spadix adnate to the spatha. 



Free-flaaiing aquatics. Fertile flowers solitary Pistia. 



** Calyx manifest ; flowers perfed. 

 t Spadix naked. 



Spadix attached to the side of the flattened leaf -like scape Acobtts. 



ARIS^MA, Mart. Indian Turnip. 



S^Mfhe convolute below, dilated and commonly arched 

 above, withering ; spadix covered below with monoecious 

 floivers (the lower ones fertile), elongated and naked above ; 

 calyx and corolla none ; stamens 4 in a whorl, very short ; 

 anther-coWs 2-4, opening at the top ; ovary 1-celled, with 

 5-6 erect orthotropous ovules; stigma sessile; /ri/j7 a 



