144 CARL SKOTTSBERG 



Masafuera: Forest on the Sanchez plain, 515 m; Q. del Mono, c. 475 m 

 (fr. 20 /2 17, no. 521); Q. del Blindado, 440 m, not uncommon; Q. de la Loberia, 

 280 m, solitary trees. 



Unfortunately, I did not pay sufficient attention to this form while in Masa- 

 fuera. Back again in Masatierra, I began to realize that the »mayu» in the 

 other island was different. I do not remember having seen any very large 

 trees in Masafuera. Of F. mayu I have seen the specimens collected by BERTERO, 

 Cuming, Moseley and Philippi, and all agree perfectly well with each other. 

 In Johow's herbarium specimens from Masafuera were missing. This is much 

 to be regretted, as a comparison would have been quite useful. I have figured 

 the flowers of F. mayu; those of F. externa are unknown, but there is little or 

 no difference in the fruit and seeds. Still, the leaves are so different that I 

 have ventured to create a new species. 



Area of distribution: Endemic in Masafuera. 



Euphorbiaceae. 

 Dysopsis Baill. 



72. D. glechomoides (Rich.) Mull. Arg. subsp. hirsuta Mull. Arg. — 

 JOHOW, Estud. 103. 



Masatierra: The commonest herb of the dark, humid forests, thriving in 

 very shady corners where few other species grow and sometimes carpeting the 

 soil for many square meters. Pto Frances (also observed by Johow), primeval 

 forest, c. 500 m; forests of the Yunque, very common about 500 m; V. Colonial, 

 Q. Gutierrez, c. 350 m (fl.-fr. V12 16, no. 42); steep slopes near Portezuelo (also 

 JOHOW), 450-600 m, common (fl.fr. 24 /i 2 16 — 3J /7 17, no. 42 b); Q. Seca, 435 m, 

 common; C. Salsipuedes, common in Dicksoma-nch forest c. 600 m; Q. Villagra, 

 in many places; Q. de la Choza, 3 — 400 m, not unfrequent. 



The island form, which was the type of a species in Herb. BERTERO, 

 but not described by him, seems to be very constant. It differs from the two 

 continental forms in the dense pubescence, the more oblong leaves and the 

 smaller seeds. MiJLLER Arg. distinguished the Chilean form as the type and 

 called the island plant var. hirsuta. I have been inclined to regard the latter 

 as a species. GRUNING, in »Pflanzenreich» Vol. IV, Pt 147: 8, p. 286, retains 

 the forms as varieties; I prefer to regard them as geographical subspecies, as 

 they inhabit widely separated areas and transitions are unknown. Subsp. genuina 

 ranges from Chilian to Fuegia, hirsuta is endemic in Masatierra and pauciden- 

 tata only known from the Andes of Ecuador. D. *hirsuta is perennial and not, 

 as says GrONING, annual or perennial; the stamens are mostly six and not 

 three; the petiole often measures 2 cm. 



Area of distribution: Endemic in Masatierra: see above. 



