CONTRIBUTIONS TO BOTANY. 
253 
fere sessilibus, filamentis brevissimis deflexis. — Buenos Ayres : 
— V. s. in herb. Jussieu, in Mus. Paris (Commerson). 
This species must be considered as the type of the genus 
whichj according to Jussieu (Gen. Plant, p. 380, ann. 1789), was 
first proposed by Commerson for a plant of his collection, who, 
however, assigned to it no specific designation : its first name, 
Colletia spinosa, was given by Lamarck (in 1793), in his ‘ lllust. 
Gen.’ tab. 129. Willdenow (in 1798) published the same plant, 
the only species then known, under the name of Colletia horrida. 
Poiret (in 1811) first detailed the characters of the genus, and 
Ventenat, in the meantime, figured and described two other 
plants, whieh he referred to Colletia. Poiret states (Encycl. 
Meth. Suppl. ii. 312) that Lamarck figured his type from the 
plant brought from Peru by Jos. de Jussieu, and from Brazil 
(Buenos Ayres) by Commerson ; but he evidently confounded 
two species together. I have seen the original specimens of 
these two plants, which are preserved in the Jussieuan Herba- 
rium, and fastened on the same sheet. Commerson’s specimen 
above described appears to be that figured by Lamarck as Colletia 
spinosa ; Jussieu’s plant, of which there are two small specimens, 
one in flower, the other in seed, corresponds with another larger 
specimen collected also in Peru (Tarma) by Dombey, which I 
have described under the name of C. aciculata. Lamarek’s 
figure, though coarsely drawn, is tolerably correet ; but the spines 
in the specimen are longer than are there represented, and not 
at all curved. I have adopted from his description and plate 
the character of the leaves which are now wanting in the two 
existing speeimens, both collected by Commerson in “ Buenos 
Ayres,” or at least in the Argentine Provinces. In the full- 
grown specimen, the spines are an inch long, and a line in dia- 
meter at the base ; in the younger specimen, with the flowers in 
bud, the spines are somewhat shorter, more slender, and more 
terete ; they are all of a dark green colour when dried. The 
leaves in Lamarck’s figure are 4 lines long and 2 lines broad. 
The slender reflexed peduncles are about a line long ; the tube 
of the calyx is 2-2g lines long, 1 1 line in diameter, its segments 
being 1 line long and g line broad*. 
2. Colletia intricata, n. sp. ; — spinosissima, glaberrima, ramulis 
compressis, spinis longis, curvulis, spinulisque decussatis, te- 
retibus, subulatis, apice callo acuto rubro puugentibus ; folds 
rarissimis, oppositis, oblongis, crassiuseulis, obtusis, dentatis, 
3-nerviis, imo in petiolum sublongum canaliculatum gradatim 
* A figure of this species, with analytical details, is given in Plate 34 a 
of this volume. 
