no CLASS XX. ORDER XVI. 



like calyx. 50» 99 — americana, (common hazlenut) 

 calyx of the fruit bell-form with a dilated border, 

 leaves cordate acuminate. >2 . g. — rosiratuy (beaked, 

 haflenui) calyx of the fruit elongated into a tubu- 

 lar beak, leaves oblong-ovate, l^, g. 



Platanus. Ament globose. Staminate flowers 

 •— corol scarcely apparent, anthers growing around 

 the filaments. Pistillate flowers — calyx many- 

 leaved : style with a recurved stigma : seed round- 

 ish, crowned with the mucronate style, with egret- 

 like hairs at the base. 50.99-— GcczV/(?n^a/i5, (button- 

 wood, or plane tree) leaves quinquangular pubes- 

 cent. l2 • g- ^ 



LiquiDAMBAR. Staminate flowers — ament co- 

 nic, surrounded with a 4-leaved involucre : fila- 

 ments numerous. Pistillate flowers — ament glo- 

 bose, surrounded with a 4-leaved involucre ; calyx 

 1 -leafed, pitcher-form, 2-flowered : styles 2 : cap- 

 sules 2, surrounded at the base by the calyx-, 1- 

 celled, many-seeded. 51.99 — styracijiua, (sweet- 

 gum) leaves palmate- lobed with the axils of the 

 veins hairy, ^i . 



Order XVI. Monadelpkia. 



PiNUS. Staminate flowers — calyx 4-leaved t 

 stamens many : anthers naked. Pistillate flowers 

 — calyxes in strobiles or cones, scales 2-flowered t 

 pistil I : nuc with a membranaceous wing. (Per- 

 haps more properly a samara.) ^2 • 51. 100— 

 Leaves evergreen, 2 i*n a fascicle. — resino»ay 

 (yellow pine) cones not half as long as the leaves— 



Same, with 3 leaves in a fascicle rigida^ 



(pitch-pine) spines on the scales reflexed— 

 Same, with 5 leaves int a fascicle — strodusj 

 (white pine) strobiles cylindric longer than leaves. 

 —-Leaves deciduous fascicled — pendula^ {bl&ck 

 larch) strobile oblong — microcardia^ (hacmatack) 



