SYNOPSIS OF GENERA. 11 



FU. 31 FERTILE FL. Style 3-cleft. Fruit 1-seeded, often spiny. 

 Cucurbitacea, p. 128. 



(Stems woody-} 

 OBS. The genera of this division belong to Conifera, p. 337. 



DlOECIA. 

 DlANDRIA. 



VALLISNERIA< STERILE FL. Spathe ovate, 2 4-parted. Spad. co-. 

 vered with minute flowers. Perianth 3-parted. FERTILE Ft. Spathe 

 2-cleft, 1-flowered. Perianth elongated, 6-parted. Stig. 3, sessile, 

 ovate, bifid. Caps, cylindric, 1-celled, many-seeded. Hydrocharidea, 

 p. 341, 



SALIX. STERILE FL. Ament cjdindric. Scales 1-flowered, with a 

 nectariferous gland at the base. Perianth none. Stam. 1 5. FER- 

 TILE FL. Scales 1-flowered. Perianth none. Stig. 2. Caps. 1-celled, 

 2-valved, many-seeded. Seeds woolly. Amtntaceoe, p. 318. 



FRAXINUS. Cat. none, or 3 4-cleft. Cor. none, or deeply 4-parted, 

 Stam. 2. Caps. 2-celled, 2-seeded, compressed and foliaceous at the 

 extremity. Polygamous. Olt ace a, p. 232. 



TRIANDRIA. 



EMPETRUM. Perianth consisting of 2 rows of scales. STERILE FL. 

 Stam, 3. FERTILE FL. Stig. with 69 spreading rays. Ber. round, 

 superior, 6 9-seeded. Empetrtct, p. 309. 



TETRANDRIA. 



MYRICA. Ament ovate-oblong ; scales lunulate. STERILE FL. Stam. 

 46. Anth 4-valved. FERTILE FL. Ovary 1. Stig. 2 Drupe 1-cell- 

 ed, 1-seeded. Amentacca, p. 324. 



VISCUM. Cal. with the margin entire or a little prominent. STE- 

 RILE FL. Pet. 4, united at base. Anth. 4, adnate with the petals. 

 FERTILE FL. Pet. 4, distinct. Stig. 1, obtuse, sessile. Ber. globose, 

 mucilaginous, 1-seeded. Loranthacea, p. 154. 



PENTANDRIA. 



NYSSA. STERILE FL. Perianth 5-parted. Stam. 510. PERFECT 

 FL. Perianth 5-parted. Stem. 5. Style 1. Drupe inferior. Santala- 

 cea, p. 307. 



ZANTHOXYLUM. Cal. 3 9-lobed r often 4 5-parted. Pet. as many 

 as the lobes of the calyx, rarely none. Stam. and carp, as many as the 

 lobes of the calyx. Zanthoxylea, p. 70. 



ACNIDA. STERILE FL. Perianth 5-parted. FERTILE FL. Per. 3- 

 parted. Stig. 3 5, sessile. Caps. 1-seeded. Chenopodea, p. 297. 



HUMULUS. STERILE FL. Perianth 5-parted. Anth. with 2 pores at 

 the extremity. FERTILE FL. Scales of the ament large, concave, en- 

 tire, 1-flowered. Per. none. Styles 2. Seed 1. Urticea, p. 315. 



CANNABIS. STERILE FL. Perianth 5^parted. FERTILE FL. Per. ob- 

 long, opening at the side. Styles 2. Nut 2-valved, covered by the 

 closed perianth. Urticece, p. 315. 



HEXANDRIA. 

 SMILAX. Perianth campanulate-spreading, 6-parted. STERILE FL. 



