OP THE GENERA. 



ORDER VHL MONADELPHIA. Stamens united into 1 set (sometimes in two 

 or three sets.) 



* Stems not woody. 



ACALYPHA. STERILE FL. Perianth 3 4-parted. Stamens 8 16. very 

 short. FERTILE FL. Styles 3, 2-parted. Capsule 3-celled ; cells 1-seeded. 

 Eupkorbiacea, p. 312. 



RICINUS. STERILE FL. Perianth 5-parted. Stamens numerous. FER- 

 TILE FL. Perianth 3-parted. Styles 3, 2-parted. Capsule mostly echinate, 

 3-celled, 3-seeded. Euplwrbiacece, p. 311. 



PHYLLANTHUS. STERILE FL. Perianth 6-parted ; segments spreading. 

 Stamens 3, very short. Anthers didymous. FERTILE FL. Perianth as in 

 the sterile. Styles 3, bifid. Capsule 3-celled. Euphorbiacea, p. 311. 



MELOTHRIA. STERILE FL. Calyx 3 5-toothed. Corolla campanulate. 

 Filaments 5, in 3 sets. FERTILE FL. Calyx and corolla as in the sterile. 

 Style 1. Stigmas 3, fimbriate. Fruit 3-celled, many-seeded. Cucurbi- 

 tacece, p. 118. 



ECHINOCYSTIS. Calyx flattish ; segments 6, filiform-subulate. Corolla 

 6-parted, rotate-campanulate. STERILE FL. Calyx slightly contracted 

 above the ovary. Stamens 3, in two sets. FERTILE FL. Abortive fila- 

 ments 3, very small, distinct. Style very short. Stigmas 2. Fruit globose- 

 ovoid, bristly-echinate. 2-celled, 4-seeded. Cucurbitacece, p. 118. 



SICYOS. STERILE FL. Calyx 5-toothed ; teeth subulate or minute. 

 Petals 5, all cohering in a tube, at length separating into three parcels. 

 FERTILE FL. Calyx constricted above the ovary, campanulate. Corolla 

 campanulate. Style rather slender. Stigmas 3, thick, obtuse. Fruit 

 ovate, spiny or hispid, 1-seeded. Cucurbitacece, p. 118. 



** Stems woody. 



THUYA. STERILE FL. Ament terminal, very small, ovoid. Perianth 

 none. Anther-cells 4, opening longitudinally. FERTILE FL. Cone with 

 the scales 2-flowered. Seeds more or less winged. Coniferce, p. 338. 



CCPRESSUS. STERILE FL. Ament solitary. Anthers 2 4-celled. FER- 

 TILE FL. Cone globose ; the scales protuberant or mucronate in the centre, 

 and finally spreading. Seeds angular, compressed. Conifers, p. 339. 



PINUS. Aments racemosely clustered ; scales peltate. Stamens nume- 

 rous, with short filaments. FERTILE FL. Aments more or less conic or 

 cylindric ; scales closely imbricate, 2-flowered, enlarging and becoming 

 woody, forming a cone. Seeds winged at the summit, covered by the 

 scales of the cone. Conifer a, p. 339. 



CLASS XX. DKECIA.-=-,S7aiCTis and Pistils in separate flowers and on 

 different plants. 



ORDER I. DIANDRIA. Stamens 15, mostly 2. 



SALIX. Ament cylindric. Perianth none. STERILE FL. Stamens 

 mostly 2, but often 35. FERTILE FL. Ovary with a gland at the base. 

 Stigmas 2, often cleft. Salicacece, p. 319. 



VALISNERIA. STERILE FL. Spathe ovate, 2 4-parted. Spadix covered 

 with minute flowers. Perianth 3-parted. Stamens 2. FERTILE FL. Scape 

 very long, flexuous or spiral. Spathe tubular, bifid, 1-flowered. Perianth 

 elongated, 6-parted ; the alternate segments linear. Style none. Stigmas 3, 



B3* 



