6G CLASS XX. ORDER 11. 



Carpi Nus. Staminate flowers: ament long-cylindric ; scales ciliate at the 

 base ; stamens 8 to 14, somewhat bearded at the top. Pistillate flowers : strobi- 

 lutn loose; scales leafy, 2-flowered ; stigmas 2; nut long, sulcate, 1-seeded. 

 (horn beam.) 



ORDER XV. MONADELPHIA. 



Jatro'pha. Staminate flowers: calyx 5-leaved or wanting; corolla funnel- 

 form; stamens 10, alternately shorter. Pistillate flowers: calyx 0; corolla 5- 

 petalled, spreading ; style 3-cleft; capsule 3-celled, seed 1. (physic-nut.) S. 



Cro'ton. Stamijiate flowers: calyx 5 toothed ; petals 5 or wanting; stamens 

 10 to 15. Pistillate flowers: calyx 5-leaved or none ; corolla none; styles 2-cleft,- 

 capsule 3-grained, 3-celied, 3-seeded. S. 



Stii,lin"gia. Staminate flowers: involucre hemispherical, many-flowered, or 

 wanting; perianth tubular, eroded ; stamens 2 or S^exsert. Pistillate flowers : 

 calyx 1-flowered, inferior ; style 3-cleft ; capsule 3-grained. (tallow-tree.) 5'. 



Meloth^ria. Staminate flowers: calyx 1-flowered, 3 to 5-toothed; corolla 

 bell-form; filaments 3. Pi.slillate flowers : calyx and corolla superior; style 1 ; 

 stigmas 3; berry 3-celled, many-seeded, (creeping cucumber.) 



Momor"dica. Staminate flowers: calyx 5 or 6-cleft ; corolla 5 or 6-parted ; 

 filaments 3. Pistillate flowers : style 3-cleft; berry gourd-like, and bursting 

 elastically ; seeds compressed, (balsam apple, wild cucumber.) 



Cu'cuMis. Staminate flowers : calyx 5-toothed; corolla 5-parted; filaments 3. 

 Pistillate flowers : calyx and corolla like the staminate ; stigmas 3, thick, 3- 

 parted ; berry with pointed seeds, (cucumber, muskmelon ) Ex. 



Cucur"bita. Staminate flowers: calyx 5-toothed; corolla 5-cleft ; filaments 



3. Pistillate flowers: calyx and corolla like the staminate; pistil 3-cleft; berry 

 large, 3 to 5-celled ; seeds thickened at the margin, (gourd, squash, pumpkin, 

 water-melon.) Ex. 



Rici'nus. Staminate flowers: calyx 5-parted; stamens numerous. Pistillate 

 flowers: calyx 3-parted ; styles 3, 2-cleft; capsules echinate, 3-celled, 3-seeded. 

 (palma christi, or castor-oil plant.) Ex. 



Si'cyos Staminate flowers : ament imbricate ; calyx 5-toothed, teeth subulate ; 

 corolla 5-parted; filaments 3, or perhaps 5 in 3 sets. Pistillate flowers ; style 3- 

 parted ; stigmas thick, 3-parted; fruit 1-seeded, often spinose. (single-seed cu- 

 cumber.) 



Pi'nus. Staminate flowers : calyx 4-leaved. peltate ; corolla 0; stamens many ; 

 anthers naked, 2, sessile ; 1-celled. Pistillate flowers: calyx in strobilums or 

 cones, scales close imbricate, 2-flowered; pistil 1 ; nut with a membranaceou* 

 wing, or a samara, (pine.) 



CupREs"sus. Staminate flowers: ament ovate, imbricate; calyx a peltate 

 scale; corolla 0; anthers 4, sessile. Pistillate flowers: ament strobilaceous; 

 calyx a 1-flowered, peltate scale ; corolla 0; germs 4 to 8, under each scale of 

 the calyx ; nuts angular, compressed, (white cedar.) 



Thu"ia. Staminate flowers : ament imbricate; calyx and corolla 0; anthers 



4, sessile. Pistillate flowers: strobilum with the scales 2-flowered; corolla Oj 

 nut 1, winged, (arbor vilse ) 



Phyllan"thus. Staminate flowers: calyx 5 or 6-paited; filaments often 

 columnar ; anthers 3. Pistillate flower resembling the staminate ; nectary a 13- 

 angled margin ; styles 3; capsules mostly 3-grained. (leaf flower.) 



Acaf.y'pha. Staminate flower : calyx 3 to 4-parted ; corolla ; stamens 8-16. 

 Pistillate flower: calyx 3-leaved ; corolla 0; styles 3; capsule 3-celled. (three 

 seed mercury.) 



CLASS XX. DICECIA. 



DIANDRIA. 



Sa'lix. Staminate flowers: ament cylindric ; calyx a 1-flowered scale, with 

 a nectariferous gland at the base ; stamens 1 to 6. Pistillate flowers : ament and 

 calyx like the staminate; stigmas 2; generally 2-cleft; capsule 1-celled, 3- 

 valved ; seeds many, with egret-like down, (willow.) 



Frax"inus. Polygamous. Perfect flowers ; calyx 0, or 3 or 4-parted ; corolla 

 0, or 4-petalled ; pistil 1 ; samara 1-seeded, with a lanceolate wing. PistillatB 

 flowers: calyx, corolla, and pistils same as perfect, (ash.) 



Vallisne'ria. Staminate flowers : spatha ovate, 2-parted; spadix covered with 

 minute flowers ; calyx 3-parted. Pistillate flowers : spatha 2-cleft, 1-flowereJ^ 



