192 CARL SKOTTSBERG 



Unfortunately, the flowers of the few male plants seen were all gone already 

 on the 13th of. December, so they remain unknown. There were only few 

 female heads still in flower and even these fairly advanced. DECAISNE, Ann. 

 sc. nat. I. 28 writes: »Vidi specim. unicum in herb. Mus. Paris, a Claudio Gay 

 relatum. Floret Januario. Fructum perfecit Februario». Gay visited Masatierra 

 in February (Johow 1. c. 38). His specimens are in fruit, and I do not think 

 they flowered in January, as every specimen seen by us must have flowered 

 already in November. According to JOHOW, only Gay and himself ever col- 

 lected this species, but in DC. Prodr. VI. 448 we find the following statement: 

 »leg. cl. Larrain et Claud. Gay»; comp. above, foot-note on p. 176. 



Area of distribution: Endemic in Masatierra. 



126. R. Gayana Dene. — Johow, Estud. 58; Skottsberg, Stud. Taf. 5, 

 Fig. 1. — Fig. 33 h— k, 35 d— e. 



Masatierra: Common on all the ridges from Pto Frances to Co Chuma- 

 cera; abundant in the higher parts where it forms a conspicuous feature in the 

 vegetation of the rocky crests; occasionally found at lower altitudes (280 m on 

 the north, 190 on the south side of the island). — Fl. Dec. 1916, nos. 22 and 

 1232 7 *, 23, 84 and 137 $; fr. April 1917, no. 23 b. 



Male plant: Heads less numerous than in $, 8 — 9 mm high, with fully 

 expanded rays up to 12 mm across (larger than the female, contrary to the 

 statement of Johow); involucre 5 — 6X4,5 — 5 mm; flowers yellow, ray florets 

 generally 8, 6 — 7 mm long, ligules almost plane, 3,5 — 4 X 2 — 2,5 mm, style 

 slightly bifid with short triangulate, acute lobes; disc florets 6 — J mm long, 

 lobes of style incrassate, conical, abruptly narrowed with apiculate tips. 



Female plant: Heads as many as 100 in the corymb, 5 — 6 mm high by 

 4,5 — 5 across; involucre 4 — 4,5 mm in length and width; flowers greenish yellow, 

 7 — 8 ray florets 5 mm long, ligule ± erect, boat-shaped, ± bifid; disc florets 4 mm 

 long not counting the exserted style, which is thick with small lobes. Achenes 

 2 — 2,5 mm long, those of the ray florets shorter and more curved. Both sexes 

 with very few and small calycular bracts. 



Area of distribution: Endemic in Masatierra. 



127. R. thurifera Dene. — Johow, Estud. 59. — Fig. 33 d — g, 35 a, f, g. 

 Masatierra: BERTERO! SOHRENs! — On the ridges, among shrubs and 



small trees, rare. C. Chifladores, one specimen 350 m, numerous about 450 m 

 (past fl. 17 U 17, no. 619 $, 620 <£). Portezuelo de Villagra (also observed by 

 SOHRENS), south-west slope of Co Piramide, 575 — 600 m, about 20 trees seen 

 (fl. 31 /i 17, no. 358 $, 367 3): one plant epiphytic on Blechnum cycadifolium. 



DECAlSNE's description refers to the female plant only, and the specimen 

 brought by SOHRENS is also female. Apparently the male plant is described 

 below for the first time. 



Heads less numerous than in $, where there are several hundred in one 

 panicle, 7 mm high, 10 mm across; involucre 4,5 — 5 by 3,5-4 mm, cylindric- 

 campanulate, of about 13 scales, united to above the middle, glabrous with 

 rather abrupt, penicillate apex. Ray florets generally 5 (sometimes 6), 7 mm 

 long, ligule dirty yellow, 4x2 mm, tridentate, a little fleshy; style long exserted, 



