254 
CONTRIBUTIONS TO BOTANY. 
angustatis, e sinu dentium stipulae minutae enatis; floribus 
pro genere majusculis 2-3, fasciculatis, e tuberculo squamoso 
infra spinas prodeuntibus, nutantibus ; calyce cylindrico, tubo 
amplo, 10-nervio, rubescente, imo carnoso, limbi laciniis 5 
albis, reflexis ; staminibus in sinubus subsessilibus, filamentis 
brevissimis. — In Andibus Mendocinis et Chilensibus : — circa 
Uspallatam (altit. 6000 ped.) et procul Mendoza (2600 ped.) 
raibi lecta ; — v, s. in herb. Hook, in Andibus Mendozae 
(Gillies); — Chile (Bridges), a Valparaiso missa, sed forsau in 
Andibus lecta. Vernac. Yaquil. 
This differs from the typical species in its longer, more slen- 
der, and more terete, obsoletely striated spines, in its general 
glaucous hue, in the form of its leaves, which are denticulated, 
and especially in its conspicuous and larger flowers. It forms 
a low, bi'anching, spiny, and almost leafless shrub. Its decus- 
sating nodes are half an inch apart; its spines are opposite, 
from 7 to 15 lines long; the leaves are 3 lines long, 1^ line 
broad, upon a petiole of 1 line in length ; the petiole is inserted 
in a sharp notch on the apex of a minute rigid stipular scale 
beneath each spine, and between the stipule and spine is seen 
the squamose tuft out of which the flowers spring. The flowers 
are of a deep rose-colour, with a white reflexed border, and are 
larger than the other species of the genus ; the pedicel is 2 lines 
long ; the calyx is tubular, not contracted in the middle, fleshy 
at the base, 3 lines long and 2 lines in diameter, the segments 
of the border being in addition 1 line long and | line broad*. 
3, Colletia invicta, n. sp. ; — spinosissima, ramulis spinisque 
compressis, glauco-pruinosis, subllavis, et molliter puberulis, 
spinis 3-seriatim spinulosis, crebris, validis, intricatis, apice 
callo rubro pungentibus; folds in ramulis novellis parvulis, 
ovatis, utrinque acutis, crassiusculis, enerviis, margine crenu- 
latis, ubique puberulis, subreflexis, subimplicatis, fere epetio- 
latis, caducissimis, e stipula enatis ; floribus majusculis, roseis, 
4—6 e tubercula squamoso infra spinas fasciculatis, nutanti- 
bus ; calyce cylindrico, tubo amplo, 10-nervio, rubro, imo 
carnoso, disco basin versus annulari, limbi laciniis 5, carno- 
sulis, pallidis, reflexis ; staminibus in sinubus parvis, filamentis 
brevissimis, stylo exserto. — Chile ? — v. s. in Herb. Mus. Paris 
[sine designatione). 
This is very different in habit from the former, being of a 
deep yellow hue, somewhat pubescent, with much shorter and 
thicker spines and closer axils. The primary spines are H-2 
This species will be shown in Plate 34 b of this volume. 
