206 Mr. J. Miers on the Tribe Colletiese. 



suffulto. In Andibus Chilensibus et Mendocinis. v. s. in 

 herb. Hook. (Gillies, Cuming). 



This species is very different in its general appearance from 

 the three preceding, its spines being much shorter, very much 

 entangled, of a dark colour ; its flowers are smaller, and more 

 contracted in the middle. The primary spines are 2-2f inches 

 long, the secondary are \ to 1 inch, the tertiary spinelets are 

 2 to 4 lines; they are all quite glabrous. The pedicels are 

 very slender, 2 lines long; the calyx, including the segments 

 of its border, is 3 lines long and 1J line in diameter in the 

 mouth ; the flowers are of a pale reddish-white colour, and of 

 thin texture*. 



5. Colletia atrox, n. sp. Discaria Americana, Hook, in parte, 

 Sot. Misc. iii. 172 ; horride spinosa, ramulis pallide olivaceis, 

 striatulis, spinis elongatis, validissimis, crassis, secundariisque 

 brevibus decussatim oppositis, glaberrimis, valde compressis, imo 

 latis et hinc subdecurrentibus, pallide viridibus, apice calloso- 

 pungentibus, aphyllis aut foliis caducissimis ; floribus majuscu- 

 lis,palidissimis,2-8, fasciculatis, e tuberculo squamoso ad basin 

 spinarum enatis; pedunculo flore paulo breviore, calyce late 

 tubuloso, medio subconstricto, textura tenui, albido, imo in- 

 flato, limbi laciniis 5 revolutis ; antheris parvulis, globosis, in 

 ore fere sessilibus, stylo exserto, imo articulate, et mox ca- 

 duco, ovario globoso, 3-lobo. Buenos Ayres. v. s. in herb. 

 Hook. (Tweedie). 



The strong and flattened spines of this plant give it a peculiar 

 character, which indicates an approach to the following remark- 

 able species. The branchlets are about 4 inches in length, the 

 primary spines 1 \ inch long, gradually diminishing upwards ; 

 their secondary spines, in one, two, or three almost horizontally 

 salient decussating pairs, are from 3 to 6 lines long, much flat- 

 tened and spreading at their base, where they are 2 lines broad 

 and half a line thick, all armed with a reddish, sharp, callous 

 point ; they are of a greenish pallid hue. The flowers, in clus- 

 tered fascicles, are nearly the size of those of C. intricata, and 

 of the same pale colour ; the tube is more globose at the base, 

 and much contracted in the middle, 2| lines long, the diameter 

 of its mouth 1^ line, and the reflected segments 1 line in length : 

 the slender peduncles are 2 lines long. This plant, by mistake, 

 is confounded with Discaria Americana in the ' Botanical Mis- 

 cellany 'f. 



* A representation of this species will be given in the ' Contributions/ 

 plate 34 c. 



t A drawing of this plant will be given in the same work, pi. 3-4 D. 



