Mr. J. Miers on the Tribe Colletiese. 375 



' globoso, 3-lobo, calycis cupula semicincto. — Circa Bueuos 

 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, 1^ line 

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

 in length*. 



Var. /3. gracilenta ; — 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, pcdunculo folio 

 sequilongo. — In Pro v. Argentinis ? — v. s. in herb. Soc. Linn. 

 Lond. 



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

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

 from Commersou'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 § inch in Jeugth ; its 

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

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

 "5 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 Cunuinghami, Fenzl, 

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

 suffi'uticosa, dumosa, ramulis erectis, virgatis, junceis, valde 

 spinosis, pubescentibus, adultioribus fere glabris, subaphyllis ; 

 spinis internodio aequilongis, decussatim oppositis, patentibus, 

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

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

 serrulatis, apice raucronatis, crassiusculis, margine cartila- 

 gineo subrcvoluto, obscure 3-nerviis, ncrvis omnino immcrsis, 

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

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

 latis, sub spinis linca 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. 



