MONOF.CIA TETRANDRIA. 



DODECANDRIA. 



364. ASARUM. Indian ginger. 



A. canadense: leaves broad reniform, germinate ; calyx woolly, deep- 

 ly 3-parted ; the segments sublanceolate, reflexed. 



HAB. Shady rocks. May June, T|_; leaves long-petiol. t pubes.; 

 Jlower axillary, pendul, solit. 



Genera. 



MONOECIA. 

 MONANDRIA. 



365. CAULINA. Sterile Fl. Perianth 0; anther sessile. Fertile 

 Fl. Perianth ; style filiform ; stigma bifid ; capsule 1-seeded. 



366. EUPHORBIA. Involucrum resembling a calyx, ventricose, the 

 alternate segments (petals L. nectaries?} petaloid. Sterile Fl. 12 or 

 more, mostly simple, each consisting of an anther with its filament 

 articulated to a pedicel, (coming to maturity successively.) Calyx 

 and corolla very rarely present. Fertile Fl. solitary, central, stipi 

 tate. Calyx and corolla ; styles 3, 2-cleft ; capsules 3-lobed. 



TRIANDRIA. 



367. TYPHA. Ament cylindrical, dense. Sterile Fl. Perianth 0; 

 stem. 3 together, upon a chaffy or hairy receptacle, united below 

 into 1 filament. Fertile Fl. below the sterile. Perianth ; peri- 

 carp pedicellate, surrounded with a hairy pappus at the base. 



368. SPARGANIUM. Ament globose. Sterile Fl. Cat. 3-leaved 

 Fertile Fl. Col. 3-leaved ; drupe dry, 1 2-seeded. 



369. CAREX. Flowers collected into an imbricate ament. Glume 1- 

 flowered. Cor. ventricose, 1-valved, persistent, including the cary- 

 opsis. 



370. TRIPSACUM. Sterile Fl. Glume 2-flowered ; the exterior flower 

 sterile, the interior neuter. Valve of the cor. membranaceous. Fer- 

 tile Fl. Glume 2-flowered ; exterior valve resembling an involu- 

 crum, perforate near the base ; cor. 2-valved ; styles 2 ; seed 1. 



371. COMPTONIA. Sterile Fl. Ament cylindric ; scales 1-flowered ; 

 cor. 0. Fertile Fl. Ament ovate ; cal. at length 6-leaved ; cor. : 

 styles 2 ; nut oval, 1-celled. 



TETRANDRIA. 



372. EPJOCAULON. Flowers collected into a compact scaly head. 

 Sterile Fl. in the disk ; perianth single, 3-elefl ; the 2 inner seg- 

 ments united nearly to their summit ; stam. 4 6. Fertile Fl. in 



