Mr. J. Miers on the Tribe Colletiese. 375 



globoso, 3-lobo, calycis cupula semicincto. Circa Buenos 

 Ayres. v. s. in herb. Soc. Linn. (Commerson). 



This is another species, existing in the herbarium of the 

 younger Linnaeus, with a ticket in his hand-writing, "circa 

 Buenos Ayres Commerson." It bears some resemblance in 

 its general habit to D. Lycioides, but its spines are shorter and 

 thicker, and its flowers are only one-fourth the size of those of 

 that species. The leaves, including the petiole, are about 2 lines 

 long, the peduncle 1 line, the calyx, including its teeth, 1J line 

 long, and 1 line in diameter. The spinules are from 3-5 lines 

 in length*. 



Var. JB. gradient a ; ramulis gracillimis, spinis nudis, remotis, 

 acicularibus, patentibus ; foliis lineari-oblongis, imo in petio- 

 lum spathulatis, integris vel summo 2-dentatis et emargi- 

 natis, discoloribus ; stipulis linea transversali nexis, nodis 

 hinc quasi articulatis : floribus solitariis, pedunculo folio 

 sequilongo. In Prov. Argentinis ? v. s. in herb. Soc. Linn. 

 Lond. 



This plant is likewise in the herbarium of the younger Lin- 

 na3us, without any locality or designation, and is probably also 

 jfrom Commerson's Collection; it has more slender branches, 

 and longer needle-like spines, and the nodes are almost articu- 

 lated; its leaves and flowers, too, are more minute. Its very 

 slender spines are 1 inch long, and half that distance apart : 

 the floriferous branchlets are only $ or f inch in ^length ; its 

 leaves (including the petiole of \ line) are 2 lines long, \ line 

 broad ; the peduncle is 1 line ; the calyx is f line long, and 

 \ line in diameter f. 



5. Discaria australis, Hook. Bot. Misc. i. 157, tab. 45 A; Journ. 

 Bot. i. 256 ; Hook. fil. Flor. Tasm. i. 69. Colletia pubescens, 

 Brongn. Ann. Sc. Nat. x. 366. Colletia Cunninghami, Fenzl, 

 PL Hug. 23. Tetrapasma juncea, G. Don, Diet. ii. 40 ; 

 suffruticosa, dumosa, ramulis erectis, virgatis, junceis, valde 

 spinosis, pubescentibus, adultioribus fere glabris, subaphyllis ; 

 spinis internodio a3quilongis, decussatim oppositis, patentibus, 

 subulatis, calloso-pungentibus ; foliis oppositis, lineari-ob- 

 longis, imo cuneatis, integris, acutis, aut summum versus 

 serrulatis, apice mucronatis, crassiusculis, rnargine cartila- 

 gineo subrevoluto, obscure 3-nerviis, nervis omnino immersis, 

 superne viridibus, subtus flavide glaucis, petiolo brevi; sti- 

 pulis parvis, oppositis, apice 2-dentatis, sinu petioliferis, imo 

 latis, sub spinis linea transversali nexis ; floribus plurimis, e 



* This species will be represented in Plate 38 E of the * Contributions.' 

 t A sketch of this variety will be given in Plate 38 F of the same work. 



