Cuatrecasanthus sandemanii (H. Rob. & B. Kahn) H. Rob., Revista Colomb. Ci. Exact. 17 (65): 210 (1989).

Robinson, Harold & Funk, Vicki A., 2012, Cuatrecasanthus (Vernonieae, Compositae): A revision of a north-central Andean genus, PhytoKeys 14, pp. 23-41 : 32

6. Cuatrecasanthus sandemanii (H. Rob. & B. Kahn) H. Rob., Revista Colomb. Ci. Exact. 17 (65): 210 (1989). Figs 8B 10

Type: Based on Vernonia sandemanii H. Rob. & B. Kahn

Vernonia sandemanii H. Rob. & B. Kahn, Phytologia 58(4): 253 (1985).

Type:

Peru. Huánuco: Carpish (above Huánuco) [09°56'47"S, 76°15'51"W, estimated], 8500 ft [2600 m], June 1938, Cuatrecasanthus Sandeman 219 (holotype: BM!; isotype: K).

Description.

Shrubs to small trees, to 3.3 m high; stems brownish, flexuous above, terete, irregularly appressed pilosulous with short pale trichomes. Leaves with petioles mostly 1-3 mm long; blades thinly papyraceous (the only species), elliptical, broadest near middle, mostly 7-9 cm long, 1.5-2.7 cm wide, base cuneate, apex narrowly acute to short acuminate, margins narrowly recurved, less recurved at apex, margins becoming shortly serrate distally with few inrolled teeth, adaxial surface dark green, rather shiny, sparsely pilosulous, more densely pilosulous on major veins, primary, secondary and tertiary veins insculpate, abaxial surface whitish, pale sericeous on veins, between major veins whitish tomentellous with prostrate myceliiform branching trichomes; secondary veins ascending with5-9 pairs. Inflorescence distinctly exceeding the reduced distal leaves, main axis and branches somewhat deflected at nodes, larger foliiform bracts restricted to primary nodes; branches densely yellowish sericeous. Heads sessile in clusters of 2-6 and clusters congested in numerous larger dense glomerules, 10-12 mm high × 1.5-2.0 mm wide; involucres cylindrical or fusiform; involucral bracts greenish brown with exposed parts purplish, ca. 15 in 4-5 series, 1.5-5.0 mm long, ca. 1 mm wide, outer bracts ovate, glabrous to subtomentellous outside, apices rounded to short-obtuse, becoming frayed, linear to narrowly elliptical, mostly glabrous, distally slightly appressed puberulous, short-acute, darkened at tips. Florets with corollas violet, ca. 8 mm long, with numerous glandular dots outside, denser on tube and few on tips of lobes, tube 3.5-4.0 mm long, lobes 3.5-4.0 mm long, ca. 0.7 mm wide; anther thecae dark reddish brown, ca. 1.3 mm long, bases papillose-fringed; apical appendage oblong, apex rounded. Achenes ca. 2 mm long, costae shortly setuliferous, between costae glandular punctate; pappus white, of ca. 65 capillary bristles ca. 7 mm long, slightly broadened at tips. Pollen grains ca. 45 µm in diam. in fluid.

Additional specimens examined.

Peru. Huánuco: Prov. Huánuco, alturas de Carpish, entre Huánuco y Tingo María [09°43'11"S, 76°05'56"W, estimated], 2800 m, February 1940, Ridoutt s.n. (USM #11579, US); Carpish, entre Huánuco y Tingo María [09°47'56"S, 76°05'47"W, estimated], 2800-2900 m, 22 August 1946, Ferreyra 1214 (USM, US), 9 August 1947, Ferreyra 2347 (US); Alrededor del Tunel de Carpish, 09°43'37"S, 76°06'07"W, 2800 m, 2 November 2001, Salina 230 (US); Prov. Huánuco, Munic. Dist. Amarilis, Sariapampa [9°58'S, 76°10'W, estimated from elevation], 3100 m, 7 May 1946, Woytkowski 34295 (F, MO).

Habitat:

Near the road in cloud forest and rain forest in semi-shade; 2800-3100 m in elevation ( Fig. 10 ).

Preliminary conservation status.

Data Deficient

Figures

Figure 8. Photographs of Cuatrecasanthus types: A Cuatrecasanthus lanceolatus, holotype (US) B Cuatrecasanthus sandemanii, holotype (BM).

Figure 10. Distribution map of Cuatrecasanthus species.