SYNOPSIS OF GENERA. XXXI 



Class XX. GYNANDRIA. Stamens situated either on tie style 

 or oermen. 



Order I. MONANDRIA. Stamen, or Sessile Anther, 1. 



* Anther of 2 distinct vertical cells, fixed to the summit of the column. (All 

 belong to the Nat. Ord. ORCHIDE^E.) 



ORCHIS. FL ringent. Lip spurred. Glands of the stalks of the pollen- 

 masses contained in a common little pouch, p. 275. 



GYMNADENIA. Lip spurred. Glands of the stalks of the pollen-masses 

 naked, approximated, p. 276. 



HABENARIA. Fl. ringent. Lip spurred. Glands of the stalks of the 

 pollen-masses naked, distant, p. 277. 



OPHRYS. Cal. spreading. Ned. without a spur, convex, p. 278. 

 * * Anther parallel to the stigma, of 2 cells close together, permanent. 



NEOTTIA. Cal. converging, embracing the base of the flat nectary, which 

 is without a spur. Pet. converging. Column without wings, p. 278. 



LISTERA. Cal. spreading. Nect. without a spur, nearly flat. Pet. 

 spreading. Column without wings, p. 279. 



* * * Anther terminal, fixed. 



EPIPACTIS. Nect. without a spur ; tumid underneath at the base; con- 

 traded in the middle, undivided at the end. p. 280. 



* * * Anther a terminal deciduous lid. 



MALAXIS. Nect. embracing the column with its concave base, without a 

 spur, sessile. Pet. spreading, p. 281. 



Class XXI. MONOZCIA. Stamens and Pistils in separate 

 flowers, on the same plant. 



Order I. MONANDRIA, Stamen 1. 



EUPHORBIA. Involucre with numerous barren fi. and I fertile. Barren fl. 

 Cal. none. Cor. none. Pert. fl. Cal. none. Cor. none. Caps. 3-lobed. 

 Styles 3, cloven. Euphorbiacece, p. 235. 



ZANNICHELLIA. Invol. none. Barren fi. Cal. none. Cor. none. Fert. 

 fl. Cal. of 1 leaf. Cor. none. Germ. 4, or more. Seeds 4, stalked. Stig- 

 mas peltate. Fluviales, p. 268. 



ZOSTERA. Fl. aggregate. Spadix flat, many-flowered. Drupe. Nut 

 with one kernel. Stigm. 2. Fluviales, p. 267- 



CALLITRICHE. Cal. none. Pet. 2, inferior. Seeds 4, naked, com- 

 pressed. Some flowers separated. Callitrichinece, p. 238. 



(For Char a see Cl, Cryptogamia.} 



Order II. DIANDRIA. 2 stamens. 



(See CaUitriche in Ord. I. Carex in Ord. III.) 



Order III. TRIANDRIA. 3 stamens. 

 TYPHA. Barr. fl, Catkin hairy. Cal none. Cor. none. Anth. about 



