SYNOPSIS OF GENERA. XXXI 



Class XX. Gynandria. Stamens situated either on the style 

 or germen. 



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.*.) 



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. Nect. 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- 

 tracted 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. Monoecia. Stamens and Pistils in separate 

 Jlowers, on the same plant. 



Order I. Monandria. Stamen 1. 



Euphorbia. Involucre with numerous barren fl. and \ fertile. Barren fl. 

 Cal. none. Cor. none. Fert. ft. Cal. none. Cor. none. Caps. 3-lobed. 

 Styles 3, cloven. Euphorbiacecc, p. 235. 



Zannichellia. Invol. none. Barren fl. Cal. none. Cor. none. Fert. 

 ft. 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 Chara see CI, Cryptogamia.) 



Order II. Diandria. 2 stamens. 

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



Order III. Triandria. 3 stamens. 

 Tyfha. Barr. ft. Catkin hairy. Cal, none. Cor. none. Anth. about 



