XXX LINNJEAN SYNOPSIS OF GENERA. 



Class XX. GYNANDRIA. 



313. Nat. Order 82. ORCHIDACE^E. Stam. 1 or 2. 

 288. ARISTOLOCHIA. Stam. 6. Stigma with 6 lobes. 



Class XXI. MONCECIA. 



Order I. MONANDRIA. 



[Stam. 1.] 



290. EUPHORBIA. Involucre bellshaped, inclosing many male 

 fl. and 1 female flower. Cor. and cal. wanting. 



348. ARUM. Spath of 1 sheathing leaf, inclosing many fe- 

 male fl. and many male fl. above them. Cal. and cor. 

 wanting. 



293. CALLITRICHE. Bracts 2 petal-like, or 0. Involucre, spath, 

 cal. and cor. wanting. 



355. ZANNICHELLIA. Involucre 0. Male fl. without cal. or 

 cor. Fern. fl. with a perianth of 1 leaf. Nuts 4, stalked. 

 Stigma peltate. 



355. ZOSTERA. Fl. aggregate in 2 rows on one side of a spadix. 



Spath ending in a leaf. 



356. NAIAS. Fl. solitary, sheathed. Perianth 0. 



Order II. DIANDRIA. 



(Callitriche, N. O. 73. Carex, N. O. 96.) 



Order III. TRIANDRIA. 



347. TYPHA. Spikes male and female, cylindrical. Ovary sur- 

 rounded with bristles. Perianth 0. 



347. SPARGANIUM. Spikes male and female, globose. Perianth 

 single, 3-leaved. 



364. CAREX. Fl. in 1 or more imbricated scaly spikes. Pe- 

 rianth 0. Perigone urn-shaped. 



364. KOBRESIA. Fl. in a compound spike. Perianth and 

 perigone 0. 



Order IV. TETRANDRIA. 



273. LITTORELLA. Cor. of male fl. with a cylindrical tube and 



4-parted limb. Stam. very long. 

 290. Buxus. Cor. of male fl. of 2 petals, fern, of 3 pet. Caps. 



with 3 beaks. 



