202 CARL SKOTTSBERG 



that D. macrophylla surpasses all the other species of Mudendroseris in size and 



beauty. It differs from these in several respects. The leaves are thinner, 

 papyraceous when dry, pure dark green. Their shape is variable. The large 

 rosulate leaves measure about 30 — 35 X 26 — 28 cm; they are broad ovate with 

 cordate base, ± acuminate, grossly and irregularly dentate with triangular, cal- 

 lose teeth. The petiole attains a length of 20 cm; it is canaliculate, winged, 

 but comparatively slender. Other rosette leaves are orbicular in outline or even 

 broader than long (18 cm long and 23 cm broad in one of my specimens), 

 cordate, deeply inciso-lobate, at least in their lower half, with linear-triangular 

 segments. The inflorescence is composed of few but very large heads on long 

 pedicels; the lower supporting leaves are petiolate, subpinnate or sinuate, the 

 uppermost sessile, entire, auriculate. The corolla is c. 45 mm long, the ligule 

 3,5 mm across. The anthers are yellow. The style is yellow, with 3 mm long 

 branches. The achenes (only few mature ones seen) are 5 — 6 mm long, brown, 

 striate, the base narrow. In the marginal ones only the ventral wing is distinct, 

 the lateral wings being poorly developed. Embryo with very short radicle and 

 trilobate cotyledons. 



Area of distribution: Endemic in Masafuera. 



134. D. macrantha (Bert, et Dene) Skottsb. — JOHOW, Estud. 70 sub 

 D. macrophylla. — Eig. 37 b — d, n. 



Masatierra: BERTERO no. 1600! — Portezuelo de Villagra, on the south- 

 west side of the pass (also observed by Johow), c. 580 m, two small specimens 

 seen (beg. fl. 31 /i 17, no. 330). 



BERTERO describes this as a tree 8 to 15 feet high and found in the 

 shady woods of the high mountains. His specimens probably came from Porte- 

 zuelo, as they bear no. 1600, for no. 1601, D. marginata, is collected in this 

 locality. To judge from Bertero's words, it seems he saw D. macrantha in 

 more than one locality. In spite of a diligent search, we only found the two 

 dwarf trees mentioned above, growing almost concealed among dense shrubs 

 of Pernettya, etc. 



D. macrantha differs from macrophylla in many respects. The leaves are 

 oblong, about twice as long as broad (large blades 25—30 cm long by 13 — 14 

 wide), firmer than in the latter, shorter petiolate (6 — 7 cm), narrow cordate at 

 base but hardly decurrent, coarsely and regularly dentate-lobate; upper leaves 

 decurrent on the petiole, subentire or entire, uppermost sessile, auriculate. 

 Heads more numerous than in macrophylla. Flowers numerous, corollas as in 

 D. macrophylla, 35 — 40 mm long; anthers lilac brown; connective tip yellow 

 with numerous low, dark papillae, not found in other species. Style darker than 

 in macrophylla. Achenes quite different, broader than long (3,5 — 4 by 4,5 — 6 

 mm), obscurely wrinkled, with narrow but distinct wings. Embryo 3 — 3,5 mm 

 long; cotyledons entire, broader than long. 



Area of distribution: Endemic in Masatierra. 



135. D. marginata (Bert, et Dene) Hook, et Arn. — JOHOW, Estud. 70 

 sub D. macrophylla; var. marginata Joh. ex REICHE, Flora de Chile V. 5. — 

 Plate 18; Plate 20, fig. 11; text fig. 37 e — i, o. 



