2007 
r COSMUS tenuifólius. 
Fine-leaved Cosmus. 
SYNGENESIA SUPERFLUA. 
Nat. ord. ASTERACEZ, $ SENECIONIDEZ. 
COSMUS, Cav. . Capitulum multiflorum, radiatum, ligulis neutris. 
Involucrum duplex, utrumque squamis 8-10 basi plus minus concretis apice 
acuminatis. Receptaculum planum paleaceum, paleis membranaceis in filum 
elongatum productis. Styli rami apice incrassati, bispidi, in conun subulatum 
producti. Anthere apice appendice scariosà cordatà superate. Achenium 
tetragonum, exalatum, rostratum, et interdüm stipitatum, aristis 2-4 retrorsùm 
piloso-scabris deciduis coronatum. Herbe Americane annue, glabre, aut 
vix pilosule, elate, romose. Folia bipinnatisecta, lobis linearibus, lanceo - 
latis, sepius margine integerrimis. Capitula ad apices ramorum longè nu- 
dorum solitaria. Discus intense luteus. Radius versicolor. DC. prodr. 
5. 607. 
lobis linearibus remotis acu- 
C. tenuifolius ; glaberrimus, foliis bipinnatisectis, | aci 
mis ovatis acuminatis, 
tissimis integris lobatisque, involucri exterioris squa 
acheniis asperis rostratis muticis vel l-triaristatis. 
Ligule cuneate, 
Herba Cosmi bipinnati sed magis laciniata et tenuior. 1 : p 
erose, rosee, subtùs pallide, unciam longe. Flosculi disci utei, antheris 
atris. Corolla bis strangulata, parte inferiore tereti, intermediá inflatá, 
supremá urceolatá. Achznia teretia, aspera, nunc rostrata mutica, nunc 
suberostria; aristis 1-3, quarum unica retrorsüm serrata, coronata. 
A beautiful annual Mexican plant, not unfrequently 
raised from imported seeds, but always flowering so late in 
the year that it js unable to ripen seed and perishes. It 
grows from a foot and a half to two feet high, and is a most 
striking object when its rich purple flowers are well con- 
trasted with the bright fennel-like leaves. zi 
It differs from C. bipinnatus in the leaves being still more 
finely cut, the outer leaflets of the involucrum less acuminate, 
* From xocpoc beautiful, in allusion to the appe 
VOL. XXIII. 
arance of the species. 
N 
