Orthosia loandensis Fontella & C. Valente [Familia Apocynaceae]

Descripción y datos generales

Publicación original

Fontella & C. Valente. (1969). Bol. Univ. Fed. Paraná, Bot., 22, 1.

Status

Endémica

Hábito

Enredadera

Ciclo de vida

Perenne

Descripción morfológica

Plants ascending, twining, heavily and dichasially branched, with distinct long and short shoots; inter nodes sparsely puberulous along single line with in curved trichomes 180–250 µm; internodes of long shoots 30–60 mm, ca. 1 mm diam.; internodes of short shoots 10–25 mm, 0.3–0.5 mm diam. Leaves with fili form, slightly canaliculate petioles 3–8 mm, usually with 2 (rarely 1) claw-shaped colleters to 0.5 mm at adaxial base; blades 26–80 × 2–11 mm, linear-lanceolate to narrowly lanceolate, basally obtuse or cuneate, apically long acute, lateral veins very indistinct, not in pairs, brochidodromous, 6 to 10 on each side of midrib, ca. 30° to midrib; adaxially very isolatedly puberulous on blade, sparsely puberulous on midrib with incurved trichomes 150–200 µm, abaxially glabrous. Inflores cences axillary, normally 2 per node, sciadioidal, 4- to 5-flowered, all flowers open synchronously, (sub-) sessile; floral bracts ca. 0.3 × 0.15 mm, ovate, hyaline, abaxially glabrous, ciliate; pedicels 2–2.3 mm, uni formly sparsely puberulous with flexuous trichomes ca. 100 µm. Flower buds 1.5–1.6 × 1–1.1 mm, ovoid; calyx abaxially with trichomes; lobes basally fused, 0.4–0.5 × 0.3–0.4 mm, ovate, apically rounded; corolla rotate to campanulate, 1.4–1.6 mm, ca. 1.7 mm diam., yel low; lobes basally fused, 0.8–0.9 mm wide, ovate to lanceolate, apically acute to obtuse, patent, adaxially puberulous. Staminal corona 1.2–1.3 mm, slightly surpassing gynostegium; lobes basally fused, ovate, acuminate, erect to patent. Gynostegium 0.7–0.8 × ca. 0.75 mm, about as long as broad, sessile, conical; anthers 600–700 µm, longer than wide, trapezoidal, abaxially planar, anther wings 700–800 µm, at ca. 20° angle, in same plane as anther, anther wings of adjacent anthers parallel to each other; connective appendages ca. 250 × 250 µm, triangular, slightly inflexed. Polli narium with corpusculum ca. 100 × 50 µm, ellipsoid; caudicles ca. 50 µm, straight, declinate; pollinia api cally attached to caudicles, 130–150 × ca. 70 µm, ovate in cross-section, obovoid to clavate, vertical. Style- head ca. 350 × 500 µm; upper part ca. 120 µm, shorter than lower part, umbonate. Follicles solitary, 35–45 × 4–5 mm, very slender obclavate, long beaked, dark brown, densely tomentose (Daneu & Amorim 70). Seeds unknown.

Material tipo

Brazil. Paraná: Município de Loanda, Pôrto São José, 246 m, mata pluvial tropical ao longo do Rio Pa- raná, 7 Apr. 1959, G. Hatschbach 5643 (holotype, MBM not seen; isotypes, MBM063900 [digital image!], MO-423864!).

Distribución

Distribución por país

Referencias bibliográficas por País

Estado de conservación

Grado de conservación: En peligro crítico (CR)

Fuente: Flora Vascular Argentina.

Se muestra la distribución por país y provincia o división equivalente. Para su conservación, se reservan los ejemplares de referencia y los vouchers.

Notas y observaciones