MONOECIA. TRIANDRIA. 203 



Aquatics: stems flexuous, leafy, many-flowered; upper 

 capituli masculine. 



Species. 1. S. ramosmn. Cn ihe banks of the Delaware, 

 common — Stem branching; stigma linear, often bifid, 

 longer than the style. 



2. * americaivim. Lower leaves equal with or exceeding 

 the stem, which is nearly simple, the floral ones concave 

 at the base and erect; stigma always simple, ovate -ob- 

 lonsr, obhq le, scarcely more than half the length of the 

 style. iSC simplex? Ph. 2. p. 34. Hab. In the vic-nity of 

 Philadelphia, common. Intermediate between S. simplex 

 and nutans, but entirely distinct. — Stem about 12 inches 

 high, erect, simple, or a little divided at the base. Lower 

 leaves carinate, floral ones concave at the base, expanding 

 flat above. Feminine aments about 2 to 5, approximating, 

 mostly sessile; male 6 to 9, sessile, partly contiguous by 

 3's. Caiicine scales 3, 4, 5, and 6, scarlose; spathuiate, 

 in the male much narrower. Style about the length of 

 the germ. 3. anjiistifoiitim. -\-. 



The" Ist species is also indigenous to Europe, where 

 there exists 2 others. 



^yi. ZEA. L. (Maize, Indian Corn.) 



Masc. Caliv 2 -flowered, 2-valved, awn- 

 less. Corolla glume awnlcss. Fem. Calix 

 and corolla also 2-valved. Style 1, filiform, pen- 

 dulous. Seeds Immersed in an oblong recep- 

 tacle. 



Culm very tall and robust, leaves broad and spreading; 

 masculine flowers paniculate, terminal; feminine spadices 

 beneath, axillary, spathe many-leaved,fconvolute> fascicles 

 of styles exserted, pendulous. 



Species. 1. Z. JlaT/s. Cultivated by the aborigines from 

 time immemorial, probably indigenous to tropical Ameri- 

 ' ca? (3. * prxcoX' Stem very low; spathes arising also from 

 the base of the culm; seeds mostly in 8 rows; styloid um- 

 bilicus obsolete. ( "Early Mandan Corn.") Successfully 

 cultivated by the aborigines of the Missouri to its sources, 

 ripening in a climate where no other variety could exist. 



Of this interesting genus there is said by the Abbe 

 Molini to exist a second species in Chili. 



633. CAREX. L. (Sedge.) 



Flowers imbricated in an ainent. Masc. Ca^ 



