OnnER 131.— AROIDS. 283 



a Spathc rolled in at base. Top of spadlx club-shaped. Dragon-root. Aris^^'ma. 1 

 b Spathe rolled inwards the whole length. Arrow-lvd. Dragon. Pkltan'uka. 2 

 b Spathe rolled backwards above, white. Egyptian Calhx. Richar'dia. 



c Perianth 0. Spathe open, flattish, white. Lvs. cordate. Wild Calla. Calla. 



e Perianth regular. Spa. shell-form. Lvs. large. Shunk-cahhage. Symplocar'pus. 

 d Flowers terminal, yellow. Scape terete. Golden Club. Oisonticm. 



d Flowers lateral, green. Scape leaf-like. Sweet Flag. A'cokus. 



1. ARISJE'MA. Arum. Indian Turnip. 



Spathe rolled inward at base. Spadix covered with flowers below, 

 naked and club-shaped above. Sterile flowers above the fertile, each a 

 clump of 4 stamens. Fertile flowers each a 1-celled ovary, with a flai 

 stigma. Berrj red, with 1 or several seeds. — Odd-looking plants, with 

 scape arising from a corm or rootstock, and sheathed with the radical 

 leaves. Taste very acrid. 



1 A. triphyl'lum. Jack-in-the- Pulpit. Leaves usually 2, trifoliate. Spathe bent aud 



inflected above, covering the obtuse spadix, striped. 



2 A. qmna'tum. Five-leaved Jack. Leaves in pairs, one or both quinate. S. 

 8 A. Dracon'tiuxn. Green Dragon. Leaf mostly solitary, pedale, 7-11-foliate. 



2. PELTAN'DRA. Arrow Dragon. 



The sterile flowers consist of 8-12 anthers attached to the border of a 

 shield-shaped (peltate) connectile. — Root fibrous. Leaves sagittate. 



1 P. Virgin'ica. Virginia A. Spathe green, incurved, long, wavy on the margin. 



Leaves many, large, hastate-sagittate, very smooth, dark. 



2 P. glau'ca. Glaucous A. Spathe white, entire, gradually unrolled and widened 



above. Leaves ovate-sagittate, the base lobes large. S. 



