LXXXli LINNAEAN ARRANGEMENT. 



Orders 3. and 4. Hexandria, and Poly and ria. 



^*The Genera of these two Orders will be found in ORD. LXXV. ARISTCLOCHJ- 



ACEAE.p. 240. 



CLASS XIX. MOtfOECIA. 

 Order 1. Monandria. 



EUPHOKBIA. Flowers in a cup-shaped 4- or 5-lobed involucre, with 

 glands at its sinuses. STAM. FLOWERS numerous, each from the 

 axil of a little bract, and consisting of a single stamen jointed on a 

 pedicel. PISTILL. FL. solitary in the middle of the involucre, con- 

 sisting of a naked 3-lobed 3-celled pedicellate ovary. Capsule sepa- 

 rating into 3 1-seeded carpels, which split elastically. ORD. XC. 



EUPHORBIACEAE. p. 259. 



ZANNICHELLIA. Flowers sessile, naked, usually both kinds in the 

 same axil. STAM. FL. a single stamen with a slender filament, 

 bearing a 2- to 4-celled anther. PISTILL. FL. usually 4 pistils in 

 the same cup-shaped involucre, becoming oblong coriaceous nut- 

 lets. Styles 4. ORD. OIL NAIADACEAE. p. 302. 



CALLITRICHE. Flowers associated in the axils of the upper leaves, 

 usually between a pair of fistular whitish bracte. Proper perianth 

 none. Fruit a somewhat fleshy nut-like capsule, indehiscent, 4-lobed, 

 4-celled. Styles 2. ORD. LXXXVIII. CALLITRICHACEAE. p. 257. 



[Arum. ORD. XCIX. ARACEAE.P. 297.] 

 [Najas. ORD. CII. NAIADACEAE. p. 302.] 



Order 2. IMamliia. 



[Fraxinus. ORD. LXXIV. OLEACEAE.JP. 238.] 



[Podostemum. ORD. LXXXIX. PODOSTEMACEAE. p. 258.] 



[Lemna. ORD. C. LEMNACEAE. p. 300.] 



Order 3. Triandria. 



TYPHA. Flowers in a long dense cylindric terminal interrupted 

 spike, with an intervening caducous spathe, the upper portion 

 sjtaminate. Proper perianth none. Ovaries surrounded by clavate 

 bristles, becoming small pedicellate nutlets. ORD. CI. TYPHACEAE. 

 p. 301. 



SPARGANIUM. Flowers in dense globose heads, in the axils of leaf- 

 like bracts, proper perianth none. Upper heads staminate. Lower 

 heads consisting of sessile pistils, each surrounded by 3 to 6 calyx- 

 like scales. Fruit a sort of dry drupe, or nutlet. ORD. CI. TYPHA- 

 CEAE. p. 301. 



COMPTONIA. STAM. FL. Aments cylindric ; bracts 1-flowered, reni- 

 form-cordate, each with 2 bractlets. Stamens 3 to 6. PISTILL. FL. 

 Aments globose, becoming bur-like, by the persistent subulate scales 

 which invest the ovaries. Fruit an ovoid-oblong smooth indehiscent 

 nut. ORD. XCIII. MYRICACEAE. p. 274. 



[Phyllanthus. ORD. XC. EUPHORBIACEAE. p. 261.] 

 [Carya. ORD. XCI. JUGLANDACEAE. p. 263.] 

 [PUea. ORD. XCYII. URTICACEAE. p. 288.] 



