22 BOTANY OF THE VOYAGE OF THE SULPHUR. 
altero brevi utrinque aucto, Ven in pagina superiore vix conspicue, in inferiore prominentes, minute 
tomentose,  Glandule pagine inferioris parva, creberrime. Corymbus terminalis, polycephalus; rami 
2 infimi oppositi, axillares, cseteri alterni, bracteis minimis vel inferioribus majoribus foliaceis subtensi. 
Pedicelli ultimi abbreviati. Capitula 4 lin. longa. Squame involucri pauciseriales, lato-lineares, vix acute, 
striate, margine scariose ; exteriores abbreviate, dorso puberulie ; interiores pappos et corollas subequantes, 
glabra, intimee scariosee. Corolle tenuiter tubulose, dentibus 5 extus parce glandulosis. Stylus basi villoso- 
bulbosus ; rami longe exserti, superne incrassati, obtusi. Achenia villosula, striis circa 10. Pappus 
caducissimus, albus, setis circa 30 uniserialibus barbato-serrulatis. 
The genus Brickellia was first established by Elliott, for a plant which ap- 
peared to him to approach the (N. American) Vernonie in habit, but distin- 
guished from Eupatorium by very slight characters only, amongst which he did 
not advert to the bulbous base of the style. De Candolle, to whom Elliott's 
plant was unknown, established under the name of Bulbostyles, a genus distin- 
guished from Eupatorium chiefly by the last named character, but with some 
general resemblance amongst the several species, in habit and involucre. Torrey 
and Gray have since ascertained that both Brickellia and Bulbostyles have the 
bulbous style, and are in other respects closely allied to each other. Accordingly 
they are placed in their Flora next to each other, with detailed generic characters, 
but with the observation that they are perhaps not sufficiently distinct,—a circum- 
stance so far confirmed by the examination of the present and of some other 
species, that I have been induced to consider both as one genus under Elliott's 
older name of Brickellia, taking that of Bulbostyles as a sectional name for those 
species which have from ten to twenty, or rarely twenty-five flowers in each 
head. .The species now described has usually about twelve flowers; in other 
respects it is shrubby, as the true Bulbostyles are said to be, but has the exserted 
style of Torrey and Gray’s Brickellia, and also, in common with many Brazilian 
species, has the corymbose inflorescence attributed to the latter genus. The 
whole group is certainly, as observed by Torrey and Gray, very near Eupatorium, 
yet if the bulbous style proves as constant as it appears to be, it may be found to 
bea Sufficient distinction where the species are so very numerous that recourse is 
necessarily had to very slight characters for the formation of genera. 
: 4 Coreturocyne obovata, sp. n., caule procumbente albo-lanato, foliis caulinis obovatis in 
petiolum longum angustatis apice subdentatis laxe albo-lanatis, ramulorum superioribus parvis, 
pedunculis involucrisque minutissime glanduloso-puberulis lana orbatis.— Bodegas. 
Dattrutex videtur ramis elongatis flagelliformibus, ramulis floriferis ad apices ramorum plurimis brevibus 
adscendentibus monocephalis. Folia caulina pollicaria, bullato-rugosa, lana laxa utrinque alba, «tate rarius 
Smudats, petiolo longo alato; ramorum floralium parva, sessilia, viridia, bractezeformia. Capitula quam in 
Cc. californica minora, minus glandulosa, squamis acutioribus angustioribus. Receptaculum nudum. Flores 
ewrulei, pulchelli. Ligule circa 20, linearia, stylo nullo, achenii radimento parvo apice pappum ferente 
paucieotum- Flores disci numerosi, tubulosi, dentibus vix extus glandulosis. Styli rami ut in C. californica 
penicillati. Acheenia villosa. Pappus rufescens, multisetus. 
