Cuatrecasanthus lanceolatus H. Rob. & V.A. Funk, 2012

Robinson, Harold & Funk, Vicki A., 2012, Cuatrecasanthus (Vernonieae, Compositae): A revision of a north-central Andean genus, PhytoKeys 14, pp. 23-41 : 30-31

5. Cuatrecasanthus lanceolatus H. Rob. & V.A. Funk sp. nov. Figs 8A 9 10

Type.

Ecuador. Zamora-Chinchipe:Loja-Zamora, km 20.6, 03°57'S, 79°05'W, 2650 m, 9 August 1997, G.P.Lewis 3424 (holotype: US!; isotypes: AAU!, GB, K, LOJA, MO, QCA, QCNE).

Description.

Shrubs to small trees up to 2 m high; stems flexuous above, hexagonal, densely pilose with brownish trichomes. Leaves with petioles mostly 0.5-1.5 cm long; blades lanceolate, broadest at basal 1/3, 4.0-9.5 cm long, 1-3 cm wide, apex distally narrowly acute, not acuminate, margins not or scarcely recurved distally, with marginal teeth projecting upward or outward (may vary in intensity), not inward, adaxial surface dark green, lamina dotted with gland-like persistent or aborted stumps of small scaber, with weakly insculpate veins, abaxial surface gray-green, tawny-pilose, sometimes contorted, denser on veins, with thin grayish prostrate myceliiform branching trichomes; secondary veins in 4-5 pairs, strongly ascending. Inflorescence distinctly exceeding the reduced distal leaves, main axis and branches mostly deflected at nodes, rounded corymbiform; branches tomentellous. Heads sessile in clusters of 2-6 congested in larger dense glomerules, 10-11 mm high × 2 mm wide; involucres cylindrical or fusiform, ca. 16 in ca. 5 series, 1.0-4.5 mm long, ca. 1.2 mm wide, short-acute, greenish brown, darkened at tips or along midvein distally, glabrous. Florets with corollas pink-lilac, ca. 6 mm long, with numerous glandular dots on basal tubes, with a few short hairs at apices of tubes, tubes ca. 2 mm long, lobes ca. 4 mm long; anther thecae dark reddish brown, ca. 2.5 mm long. Achenes ca. 2 mm long; pappus white, of ca. 45 capillary bristles ca. 6.5 mm long, not or scarcely broadened at tips. Pollen grains ca. 35 µm in diam.

Additional specimens examined.

Ecuador. Loja: Road to Zamora from Loja, km 12-14, near top of pass, [03°59'6"S, 79°08'23"W, estimated], 2800 m, 28 September 1961, Dodson & Thien 781 (US-2!).

Habitat.

Local in secondary scrub at 2650-2800 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 9. Cuatecasanthus lanceolatus: A Habit B Cluster of heads C Single head containing one floret D Floret showing corolla lobes divided to base of limb, with thickened margins and apical pubescence E Style F Achene with 8 - 10 ribs.

Figure 10. Distribution map of Cuatrecasanthus species.