﻿COMPOSITE. 55 

 the limb of the calyx or pappus. Seed destitute of albumen. Radicle 

 short : cotyledons flat or plano-convex.— Herbs, rarely shrubs or trees 

 (forming about one-tenth of phanerogamous vegetation) ; with alternate 

 or opposite sometimes divided or lobed exstipulate leaves. Branches 

 often corymbose, terminated by the heads, the central ones earliest 

 developed. Flowers in each head expanding successively from the 

 margin (or lower portion) to the centre or apex, either all of the same 

 color {homochromoiis), or the marginal ones different from those of the 

 disk (heterochromous), the latter in this case almost always yellow ; 

 either perfect, polygamous, or diclinous. 



Itn,/>„: we have employed none Of these terms. 'J'he head is said to he fi.mo^a- 

 pi^tilhUeT.r t?ullS **and^!tL^f!ih!^ pj^cc^ amin it- u'T" t^rmTd 'rl^i w}!e" 



or obsolet"^ "f ''"^ «lveoli are irrf2:ularly lacerate or bristly ; nmylrvte wlK^n a sligh 

 anthers are usually more or less prolon<red at the summit into a membranous ap 

 pendage {appetulicvlate) ; and sometimes eacli h.lie or crll boars a subulate or seti 

 fo™JPPendagc at the base, wlien they are said to be cmuiote. I'hc achenia an 



but'i'j c"^ summit prolonged into a l'<5ak ; in which case' the pappus^is oft^n 



of this Tast family, we introduce a synopsis of its leading divisions; and give, a\ 



CONSPECTUS OF THE TRIBES. 



Tribe I. VERNONFACEiE. Style of the perfect flowers cyl 

 usually elongated and subulate, hispid throughout 

 extending beyond their middle. 5o, 



Tribe II. EupATORiACEa;. Style of the perfect flowers cy 

 elongated, obtuse or clavate, externally puberulent 

 summit ; the stigmatic lines obscure, terminating ne: 



