22 
James Small. 
various forms in comparatively distantly related genera favours 
the assumption that this change can take place with comparative 
ease. 
Fig. 10. Corolla forms—A, Cavea ianguensis, filiform; B, Stokesia cyanea ; 
C, Bvachyglottis repanda, ray; D, Nassauvia axillave; E, Nanothamnus sericeus, 
disc; F, Dipterocome pusilla, ray ; G, Ainslicea pteropoda; H, Catamixis baccharoides 
(after Thomson) ; J, Cryptostemma calendulacea, ray; K, Anacyclus clavatus, disc; 
L, A. clavatus, var. inconstans, disc ; M , A. tomentosus, disc ; N, Siebera pungens; 
O, Mutisia lanata, disc ; P, M. lanata, ray ; Q, Erythrocephalum zambesiacum, ray ; 
R, Seris polymorpha, ray; S, Hinterhubera columbica, one variation of ray ; 
T, Tridax Mandonia, ray; U, Monolopia major, ray; W, Microspermum 
debile, ray. 
The origin of the ligulate corolla can scarcely be other than a 
discontinuous variation,as there is no genus in theTubuliflorae which 
shows even rarely the true ligulate corolla. The five-lobed, palmate 
corolla of Stokesia (Pig. 10, B) and the sub-palmate, five-lobed or five¬ 
toothed corolla, which occurs rarely in some species of Elephantopus 
(Vernoniese), Pentachcete, Lessingia, Pterigeron (Astereae), Chromole - 
pis (Heliantheae), CepJialophora, Helenium (Helenieas), Chrysanthe¬ 
mum (Anthemideas), Senecio (Senecioneae) and more commonly in 
several genera of the Cynareae and Mutisieae, are ob-ovate and 
palmately lobed, not oblong with practically parallel margins and 
five triangular teeth like the corolla of the Cichorieze. 
This palmately lobed corolla is only one particular case of the 
