Mr. J. Miers on the Tribe Colletiese. 11 



2-loculari. — Ins. Gallapag03. — v. s. in herb. Hook. ; Albemarle 

 Island (Darwin). 



This plant appears to correspond well in its characters with 

 the preceding and the following species : it grows abundantly, 

 forming thickets near the sea. Its branchlets are slender and 

 very glabrous ; the spines are from 12 to 20 lines long, and the 

 internodes 4 lines apart ; the leaves are nearly 1 inch long, and 

 4 lines broad, on a petiole 1 line in length. It is worthy of 

 remark, as indicative of the limit of the genus, that many of the 

 plants of the Gallapagos are identical with those of Guayaquil, 

 which is in the same latitude, and the nearest opposite point 

 of the continental coast *. 



3. Scypharia senticosa ; — Rhamnus senticosa, H.B.K. vii. 54; — 

 Sageretia senticosa, Brongn. Ann. Sc. Nat. x. 360 ; — Colletia 

 spicata, Willd. in R. §■ Sch. v. 513; — fruticosa, orgyalis, ra- 

 mosissima, spinosissima, glaberrima, subaphylla, ramis sub- 

 oppositis, ramulis teretibus, spinis decussatim oppositis, lon- 

 gissimis, subulatis, teretibus, patentissimis ; foliis paucis, ad 

 basin spinarum solitariis, ovatis, basi rotundatis, integerrimis 

 sub-5-plinervibus, subcoriaceis, glaberrimis, glauco-viridibus, 

 deciduis, petiolo brevi, supra canaliculato, glabro, basi articu- 

 lato; floribus 5-meris, minutis, 5-6, sub basi spinarum 

 fasciculato-glomeratis, sessilibus, viridibus, bracteolatis; fructu 

 baccato, globoso, abortu 1-spermo; semine lenticulari. — 

 Vern. Molono incolarum. — Peruvia alta, Prov. Truxillo ad 

 Contumasay. — v. s. in herb. Mus. Paris., Zarzal (Bonpland, 

 3720). 



There is a great approximation of characters between this and 

 the two former species, and more especially with the last, the 

 principal difference consisting in its ovary, which is represented 

 as being 3-locular, — a difference which it must be remembered 

 exists also in Trevoa. Contumasai, where it is found, is scarcely 

 4° south of Guayaquil. Its branchlets are glaucous, and obso- 

 letely pubescent, as well as sub-4-gonous ; its spines are hori- 

 zontal and opposite, sometimes a little alternate, and from 10 to 

 20 lines long ; its leaves are said to be not quite an inch long, 

 on a petiole 1 line in length, but they are now wanting in the 

 specimen. Kunth observes that the leaves are very deciduous, 

 and that the specimen he examined was almost aphyllous, look- 

 ing quite like a Colletia ; the same may be said of S.pauciflora. 

 The fioriferous branchlets are about the length of the spines, 

 spring from below them, and are more slender and flexible : the 

 flowers (1 or 2) are sessile in the opposite axils of the nodes, 



• 



* This species will be represented in the 'Contributions,' Plate 12 b. 



