CLASS XX. ORDER III. 367 



la (or calyx) 1 leaved, 5 or 6 parted ; stamens 10 to 20. Pistillate flowers 

 calyx 5 or 6 leaved, (or 5 or 6 lobed) muricate ; germs ? ; stigma pencil-form ; 

 nuts 3, with coriaceous putamen, enclosed in the calyx, becoming echinate. 

 50. 99 (chesnut). S. 



BE"TULA. Staminate flowers ament cylindric, imbricate, scales peltate, 

 3 flowered ; stamens 10 to 12 Pistillate flowers calyx a 2 or 3 flowered 

 scale : seed 1, winged. 50. 99 (birch). S. 



PLAT"ANUS. Ament globose. Staminate flowers corolla none or scarce- 

 ly apparent, anthers growing around the filaments. Pistillate flowers calyx 

 many leaved ; style with a recurved stigma ; seed roundish, crowned with the 

 mucronate style, with egret-like hairs at the base. 50. 99 (button-wood, false 

 sycamore). S. 



JUG"JLANS. Staminate flowers ament imbricate ; calyx a scale, generally 

 5 parted ; corolla 4 or 5 parted ; stamens 18 to 36. Pistillate flowers calyx 4 

 cleft, superior ; corolla 4 cleft or 4 parted ; styles 1 or 2 ; drupe partly spongy ; 

 nut rugose and irregularly furrowed. 50 94 (butternut, black walnut). S. 



CAR"YA. Staminate flowers ament imbricate ; calyx, 3 parted scales ; 

 corolla ; stamens 4 to 6. Pistillate flowers calyx 4 cleft, superior ; corolla 

 : styles ; stigma disk-like, 4 lobed ; pericarp 4 valved ; nut sub-quadrangu- 

 lar, oven. 50. 94 (hickory, walnut). S 



ORDER XV. MONADELPHIA. 



A. Stems not woody. 



MOWOR' ; 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. 34. 97 (balsam apple, wild cucumber). 



Exotic. 



CUC^UMIS. Staminate flowers calyx 5 toothed ; corolla 5 parted ; fila- 

 ments 3. Pistillate flowers calyx and corolla like the Staminate ; stigmas 3, 

 thick, 2 parted; berry with sharpish seeds. 34. 97 (cucumber, musk-melon). 



CUCUR'BITA. Staminate flowers calyx 5 toothed ; corolla 5 cleft ; fila- 

 ments 3. Pistillate flowers calyx and corolla like, the Staminate ; pistil 3 

 cleft ; pomaceous berry large, 3 to 5 celled ; seeds thickened at the margin. 

 34. 97 (gourd, squash, pumpkin, water-melon). 



RICI'NUS. Staminate flowers calyx 5 parted ; stamens numerous. Pistil- 

 late flowers calyx 3 parted ; styles 3, 2 cleft ; capsules echinate, 3 celled, 3 

 seeded. 38. 96 (palma christi, or castor oil plant). 

 B. Stems woody. 



PI'NUS. Staminate flowers calyx 4 leaved, peltate ; corolla ; stamens 

 many ; anthers naked, 2, sessile, 1 celled. Pistillate flowers calyx in strobiles 

 or cones, scales closely imbricate, 2 flowered ; pistil 1 ; nut with a membrana- 

 ceous wing. (Perhaps more properly a samara). 51. 100 (pine). S. 



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 ; germs 4 to 8, under each scale of 

 the calyx ; nuts angular, compressed. 51. 100 (white cedar). S. 



CLASS XX. DIGGCIA. 



ORDER II. DIANDRIA. 



SA'LIX. Staminate flowers ament cylindric ; calyx a 1 floAvered 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 ; 2 valved ; seeds many, with egret-like down. 50.99 (willow). <S. 



FRAX"INUS. Polygamous. Perfect flowers calyx 0, or 3 or 4 parted ; co- 

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

 tillate flowers calyx, corolla, and pistils same as perfect. 44. 37 (ash). -S. 



ORDER III. TRIANDRIA. 



Exotic. 



Fi'cus. Common receptacle fleshy (becoming the fruit), enclosing the ape- 

 talous florets ; both staminate and pistillate, either in the same, or in distinct 

 individuals. Staminate flowers calyx 3 parted. Pistillate flowers calyx 5 

 parted ; pistil 1, lateral ; seed 1, covered with the closed, permanent, some- 

 what fleshy calyx. 53. 98 (fig-tree). 



