1014 



SYNOPSIS OF THE CLASSES, 



Cohort XXX. Urticales. — Tlowers diclinous, 5 in Ulmacem. Periantli green, 

 usualy regular, rarely 0. Stamens opposite the perianth-lobes or sepals. Ovary superior, 

 1-celled (2-oelIed in Vlmacem) ; stigmas 1-2 ; ovule solitary, micropyle always superior. 

 Fruit usually an achene or samara. Embryo straight, albuminous or not. 



192. Ubtice^. Flowers diclinous or poly- 

 gamous. Perianth various, imbricate or val- 

 vate^ rarely 0. Stamens usually equal to the 

 perianth-lobes; filaments uncoiling elastic- 

 silly. Style simple or raultifid. Ovule erect, 

 orthotropous. Embr3'0 straight, albuminous. 

 — Herbs, rarely trees ; juice limpid ; leaves 

 stipulate 6CS 



103. MoEEA Flowers diclinous, minute, 

 often on an open or closed receptacle. Peri- 

 anth tubular or 3-4-partite or 0. Stamens 

 as in Urticew, but filaments sometimes 

 straight. Styles 1 or 2 ; ovule various. Em- 

 btyo straight or curved, albuminous or not. 

 -^Trees or shrubs; juice milky; leaves al- 

 ternate ; stipules large, fugacious . . . 669 



194. OBMlDBm Flowers polygamous. Pe- 

 rianth 5-partite, persistent, imbricate. Sta- 



mens as in UrticecB. Styles 2 ; ovule basilar, 

 campylotropous. Embryo curved ; albumen 

 scanty or 0.— Trees; juice watery; leaves 

 alternate ; stipules fugacious . . . 673 



196. Cannabine^. Flowers diclinous. 

 Perianth ^, sepals 5, free, imbricate; $, 

 various. Stamens 4, opposite the sepals; 

 filaments short. Styles 2; ovule pendulous, 

 campylotropous. Embryo hooked or coiled, 

 exalbuminous. — Herbs; juice watery; leaves 

 atipttlate 674 



196. TJiMACEiE. Ilowers ^ • Perianth 

 campanulate, persistent, 4r'8-fid. Stamens 

 opposite the perianth -lobes ; anthers extrorse. 

 Ovary l-2--celled ; styles 2 ; ovules 1 pendu- 

 lous in each cell. Embryo straight, exalbu- 

 minous. — Trees; juiee watery; leaves alter- 

 nate; stipules fugacious .... 676 



Cohort XXXI. Amentales. — Flowers diclinous, in catkins, cones or head^. Perianth 

 0, or calyciform, of of one or more bristles, bracts, bracteoles or scales. Ovary superior, 

 1-^2- celled. Seeds exalbnminous. — Trees or shrubs ; leaves alternate, simple. 



197. Betulace*. Flowers monoecious, 

 in slender catkins. Perianth ^ a 4-lobed 

 cup or scale ; ^- of accrescent scales. Ovary 

 with 2 2-ovuled cells ; styles 2 ; ovules pen- 

 dulous, anatropous. Radicle superior. — 

 Leaves stipulate . . , . . . 677 



198. PiATANB^. Flowers monoecious, in 

 globose catkins. Perianth ^ and 2 of slender 

 scales or bristles. Ovary 1-celled ; style 1 ) 

 ovule 1, pendulous, orthotropous. Radicle 

 inferior. — Leaves alternate j stipules leaf- 

 opposed, sheathing ..... 679 



199. MTBiCEiE. Flowers mon- or di- 

 oecious, in long or short catkins, sessile in 

 the axils of scales. Perianth $ 0, or of scales 



or bracts. Ovary .1-oelled ; styles 2 ; ovule 

 1, erect, orthotropous. Radicle superior. — 

 Leaves alternate, stipulate oi- not . . . 681 



200. Casttakinejs. Flowers mon- or di- 

 oecious; (3* in catkins, monandrous, 4-brac- 

 teate ; $ in heads, bracteate and 2-bracteolate. 

 Ovary 1-celled ; ovules geminate, semi-anatro- 

 pous. Radicle superior. — Leafless trees, with 

 slender jointed branches; joints ending in 

 toothed sheaths 683 



201. Salicineje. Flowers dioecious, in 

 the scales of catkins ; (^ of a 1-celled ovary, 

 with several basal anatropous ovules ; stigma 

 2-3-labed. Seeds comose. Radicle inferior. 

 —Leaves stipulate ..... 685 



Cohort XXXII. Euphorbiales. — Flowers g or diclinoris. 

 Ovary superior, 2-oo -celled ; ovules l^oo in each cell) penldutons 

 usually capsular, l-oo -celled ; cells l-oo -seeded. 



Perianth various or 0. 

 anatropcras. Fruit 



202. Eui'HOKBlACEJB. Flowers diclinous. 

 Perianth various or 0, sometimes dichlamy- 

 deous. Anthers usually globose or didymous. 

 Ovaiy 3- (rarely 1-2- or oo-) celled ; ovules 

 Bolitilry or geminate in each cell, usually 



operculate. Fruit usually 3-coccous, rarely 

 a berry. Embryo straight in copious albu- 

 men. — Herbs, shrubs or trees; leaves usually 

 alternate and 3-stipulate .... 687 

 203. BnxiNE.a;. Flowers monoecious. Se- 



