486 Mr. J. Miers on the Tribe Colletieae. 



broom-like habit, having very long, straight, erect branches, more 

 woody than in the preceding species, and all terminating in an 

 acute spine. The stemlets are more slender, less deeply striated, 

 with the internodes about J inch apart ; out of these nodes, in 

 the younger branches, short foliiferous sprouts make their appear- 

 ance, and out of the nodes of the upper part of the principal 

 (annotinous ?) branches, are produced the opposite spicated 

 racemes of flowers, which are nearly the length of the internodes, 

 bearing about three or four pairs of opposite flowers. The 

 leaves are 1-1 i line long, only J line broad, cuneate, upon a 

 very short petiole, entire, fleshy, 3-nerved, slightly pubescent, 

 and folded back upon themselves ; the pedicels are ^ line long, 

 bracteated at base ; the tube of the calyx, including the seg- 

 ments, is 1 J line long, and 1 line in diameter; the flowers are of 

 a rose-colour. The fruit is spherical, 8 lines in diam.* 



4. Retamilia articulata, n. sp.; Colletia articulate ,Philippi, Linn. 

 xxviii. 679 ; suffruticosa, glaberrima, ramis teretibus, Isevibus, 

 simpliciter intricatim spinosis, spinis longiusculis, ramulisque 

 articulatim nodosis, creberrime granuloso-punctulatis, apice 

 calloso-pungentibus ; foliis in ramulis novellis parvulis, ovatis, 

 utrinque acutis, integris, crassiusculis, eveniis, glaberrimis, 

 caducissimis, petiolo canaliculate in sinum stipulse 2-dentata3 

 affixo; stipulis oppositis, linea transversali nexis (nodis pro- 

 inde quasi articulatis) ; floribus in articulationibus utrinque 

 24, fasciculatis, e tuberculo bracteato enatis, pedunculo flori 

 sequilongo, calyce cylindrico, limbi laciniis 4 3 triangularibus, 

 erectis; petalis 4, squamiformibus, acutis, laciniis dimidio 

 brevioribus; staminibus totidem, filamentis incurvatis, bre- 

 vissimis, antheris ovalibus, petalis 2-plo latioribus, rima hippo- 

 crepica hiantibus, peltatim affixis ; stylo brevi, incluso ; stig- 

 mate capitato-3-lobo. In Andibus Chilensibus versus Chilian 

 (lat. 36 0t sS&g-v. s. in herb, meo et Hook. (Germain). 



This plant has much the habit of the three preceding species, 

 but its branches are not so virgate, and have much shorter 

 internodes : tjB branches, almost bare of leaves and spines, are 

 quite ^y?ete, JBffectly smooth, the internodes being J to J inch 

 apart f the spjfes are 8 to 12 lines long, the floriferous branchlets 

 are twice or ^n-ee times that length, having the appearance of 

 articulated spines, and are often again spinose. The stipules at 

 the nodes are small, simple, and acute, and the line of their 

 connexion gives an articulated appearance to the branches. Very 

 young branchlets, bearing leaves and flowers, grow out of the 

 upper nodes, and, from the proximity of the axils, they appear 



* A representation of this species, with analytical details, will be given in 

 the * Contributions,' Plate 3.9 E. 



