THE PHANEROGAMS OF THE JUAN FERNANDEZ ISLANDS 1 93 



lobes ovate with penicillate apex. Disc florets 5 mm long, not counting the 

 exserted stamens, yellowish green; stamens distinctly thickened below the anther, 

 style a little exserted with orbicular-triangulate, slightly divergent stigmas, their 

 tips penicillate. Pappus composed of very few bristles. 



The following notes complete the earlier short descriptions of the female 

 plant. Head 4 mm high and 4,5 across, involucre only 3X3 mm, smaller than 

 in all the other species, with few inconspicuous calycular bracts. Ray florets 

 generally 8, sometimes as few as 5, yellowish green, only 3 — 3,2 mm long with 

 a small (1,5 X 0,7 mm), boat-shaped ligule; style thick with short lobes, yellowish 

 green; disc florets of the same colour, 3 mm long, not counting the exserted 

 style; stigmas short, divergent. Achenes 10-costate ace. to DECAISNE, 5 — 10- 1 

 costate ace. to JOHOW; I found them 5 — 8-costate, ribs little prominent and not 

 equidistant. The achene is crowned by a narrow ring much less conspicuous 

 than in R. Gayana. On most of the achenes examined there are one or more 

 thick, white stripes, which proved to be composed of the resin exuded on the 

 stem of this and other Robinsonias, but not met with on the achene in any 

 other species. These clumps of resin were observed by DECAISNE, 1. c. 24: 

 »le R. thurifera a ses fruits munis de cotes tres saillantes et formees par une 

 substance medullaire blanchatres. The marginal achenes are shorter (1,5 mm 

 long) and more curved than those of the centre, where they are 2 mm long, a 

 difference also noted in R. Gayana. There are only 5 to 10 bristles, while, in 

 all the congeners, they are much more numerous. 



Area of distribution: Endemic in Masatierra. 



128. R. evenia Phil. — Johow, Estud. 60. — Fig. 33 1— o, 34 b, 35 b. 



Masatierra: Germain! Reed! Downton! Moseley!, all without locality. 

 — Not uncommon in the eastern and central parts, along the higher ridges, 

 at the limit of the forest among brushwood, or in the humid, Dicksonia-rich 

 woods. — C. Chifladores, one large, apparently not epiphytic specimen at 350 m, 

 many in the forest 500 m, all epiphytic; between Q. de la Piedra Agujereada 

 and Q. Laura, c. 500 m, on Dicksonia, abundant; C. Centinela, 560 m, on Dick- 

 sonia, abundant; the depression between Co Damajuana and Co Yunque, 580 m, 

 on Thyrsopteris; V. Colonial, C. Central, 570 m, on Dicksonia; Portezuelo de 

 Villagra, among shrubs c. 600 m, several trees, all growing on tree-ferns (fl. $ 

 3 J2 16, no. 25); C. Salsipuedes, in Dicksonia-grove, 670 m, seedlings (no. 74) 

 and adult plants, all epiphytic (fl. 13 /i 17, no. 82 $, 83 <£); dense forest on a 

 mountan spur west of Co Yunque, c. 500 m, epiphytic; Q. Villagra, c. 500 m, 

 on Dicksonia. 



Curiously enough it is nowhere stated that R. evenia is an epiphyte. It 

 grows on the trunks of tree-ferns; only in one single case a large and old speci- 

 men was found growing on the ground, but I am inclined to believe that also 

 this had germinated on the base of a fern tree, sending, as it often does, roots 

 into the soil, and that the original substratum had disappeared. The seedling 

 has fleshy, densly pilose, coarsely serrate leaves. Even the old, perfectly 

 glabrous leaves are much more fleshy than in other species, a circumstance 

 perhaps connected with the epiphytic life; they are as much as 1 mm thick 

 (not counting the midrib), and the veins are hardly visible. 

 1 ? 20100. The Nat. Hist, of Juan Fernandez and Easter I si. Vol. II. 



