278 
CONTRIBUTIONS TO BOTANY. 
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, line 
long, and 1 line in diameter. The spinules are from 3 to 5 lines 
in length*. 
Var. /3. gracilenta ; — ramulis gracillimis, spinis nudis, remotis, 
acicularibus, patentibus ; folds 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- 
naeus, without any locality or designation, and is probably also 
from Commerson’s Collection; it has more slender branches 
than the preceding, and longer needle-like spines, and the nodes 
are almost articulated; 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 
m length ; its leaves (including the petiole of ^ line) are 2 lines 
long, ^ line broad ; the peduncle is 1 line line ; the calyx is 
I line long, and \ line in diameter f- 
5. Discaria australis, Hook. Bot. Misc. i. 157, tab. 45 a; Jourh. 
Bot. i. 256 ; Hook. fil. Flor. Tasm. i. 69. Colletia pubeseens, 
Rrongn. Ann. Sc. Nat. x. 366. Colletia Cunninghami, Fenzl, 
PI. Hug. 23. Tetrapasma juncea, G. Don, Diet. ii. 40 ; — 
suflfruticosa, -dumosa, ramulis erectis, virgatis, junceis, valde 
spinosis, pubescentibus, adultioribus fere glabris, subaphyllis ; 
spinis internodio sequilongis, decussatim oppositis, patentibus, 
subulatis, calloso-pungentibus ; folds oppositis, dneari-ob- 
longis, imo cuneatis, integris, acutis, aut summum versus 
serrulatis, apice mucronatis, crassiuscuds, margine cartila- 
gineo subrevoluto, obscure 3-nei’viis, nervis omnino immersis, 
superne viridibus, subtus flavide glaucis, petiolo brevi; sti- 
puds parvis, oppositis, apice 2-dentatis, sinu petiodferis, imo 
latis, sub spinis linea transversali nexis ; floribus plurimis, e 
* This species is represented in Plate 38 E of this work, 
t A sketch of this variety is given in Plate 38 p. 
