Mr. J. ]\Iiers on the Tribe Colletiese. 489 



calyce extus superne subgloboso, albescente, imo inflate, viridi 

 et piloso, limbi laciniis 4, erectiusculis ; petalis 4, niveis, laciniis 

 brevioribus; staniimbus 4, inclusis; antheris reniformibus, 

 flavis, conuectivo albo ; stylo ovarioque 2-loculari pilosissimis ; 

 fructu ovali, subcarnoso, calyce marcido fulto ; nuce ovata,' 

 2-loculari, s?epe abortu 1-loculari.— Chile.— t'. v. ad Concon.— 

 V. s. in herb. Hook. (Cuming, 732). 



This tree is of frequent occurrence upon the hills throughout 

 the province of Quillota, in which the port of Valparaiso is situ- 

 ated, and is, I believe, more generally distributed, at no great 

 distance from the sea-coast, in the central provinces of Chile : 

 sometimes it appears as a tall bush, but it grows ordinarily to the 

 height of 8 or 10 feet, with widely-spreading branches. Its 

 trunk, scarcely exceeding 4 or 6 inches in diameter, consists of 

 hard red wood, which is much sought for, as it makes an excel- 

 lent fuel ; it is also greatly in request for building purposes. Its 

 spreading, opposite, subulate, green spines, which decussate at 

 the distance of half an inch apart, are from half an inch to 1 inch 

 in length. A single leaf issues from its corresponding stipule, 

 that springs from the base of each spine. The leaves ordinarily 

 measure | inch, sometimes an inch in length, and 3 or 4 lines in 

 breadth, the petiole being 1 line long. Each floriferous branch 

 usually originates from the expansion of a tubercle situated 

 between the spine and the stipule, and is commonly from U to 

 3 inches long, with several decussating pairs of leaves towards its 

 base, at distinct intervals of 1 to 3 lines, at each of which points 

 two or four flowers arise, the leaves gradually disappearino- 

 towards the ends of these branchlets, the axils then approxi^ 

 mating by degrees, so that the flowers assume a spicate ap- 

 pearance; each flower is from 1^ to 2 lines long, on a peduncle 

 less than a quarter of a line in length ; the calyx is of a yellowish- 

 white colour, is somewhat contracted in the middle, glabrous in 

 the upper part, the inflated base and peduncle being of a greenish 

 hue and pubescent ; it is constantly 4- toothed on its border, all 

 its parts being 4-meroiis, and the hooded petals snow-white, 'its 

 somewhat compressed oval drupe, enclosing a hard nut, is 2 lines 

 long, and I^ line in diameter ; the nut is ligneous and inde- 

 hiscent*. Cuming's specimen in Sir William Hooker's herbarium 

 IS not in seed. Germain's plant, distributed under the name of 

 Trevoa 3-nervia, is Nutophcena foliosa. 



2. Trevoa tenuis, n. sp. ;— Retanilla 3-nervia, Hook, t^ Am. in 

 parte, Bat. Misc. iii. 174;— arbiiscula prrecedentis simillima, 

 sed omnino pilosior, spinosa, ramulis sub-4-gonis, tenuibus' 



* This plant, with analytical details, will be shown in the ' Contributions ' 

 Plate 40 a. ' 



