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558 FIELD MUSEUM OF NATURAL HISTORY BOTANY, VOL. XIX<br />

BRITISH GUIANA: Kukenam River, Im Thurn 84 (EG, EM,<br />

K, N). Mt. Roraima, G. H. H. Tate 207 (Y).<br />

BRAZIL: Amazonas: Rio Branco, Kuhlmann 2803 (Bo, Go, K,<br />

N, S, Ut). Para: Lago do Salgado, near Rio Trombetas, Ducke 16968<br />

(B, G, Gen, Go, type, N, S). Upper Cupary River, Krukoff 1141<br />

(Gen, Y).<br />

The foliage of P. longiracemosa is<br />

much like that of P. fuchsiiflora,<br />

the shape of the leaves showing the same variation. The<br />

arrangement of the inflorescence of the two is very different. From<br />

other species with a racemose inflorescence P. longiracemosa is<br />

readily distinguished by the very thick leaves, which are strongly<br />

glaucous beneath.<br />

349. Passiflora securiclata Mast. Kew Bull. 1893: 12. 1893.<br />

Tacsonia spinescens Klotsch in Schomb. Reise Brit. Guian. 1168.<br />

1848, name only.<br />

Passiflora retrorsa <strong>Killip</strong>, Journ. Wash. Acad. Sci. 14: 116. 1924.<br />

Subscandent, glabrous shrub, the tendrils usually reduced to<br />

recurved spines 1 to 1.5 cm. long; stipules setaceous, soon deciduous;<br />

petioles 1 to 1.5 cm. long, those of reduced leaves on floriferous<br />

branches 2 to 4 mm. long; leaves of main branches narrowly oblong,<br />

ovate-oblong, or oblong-lanceolate, 6 to 12 cm. long, 2 to 5.5 cm.<br />

wide (those of floriferous branches oval, 2.5 to 3.5 cm. long, 1.5 to<br />

3 cm. wide), obtuse, usually emarginate, rarely bluntly short-acuminate,<br />

rounded at base, penninerved (principal lateral nerves 8 or 9<br />

to a side), plainly reticulate-veined, coriaceous or subcoriaceous,<br />

concolorous, lustrous on both surfaces; inflorescence in pseudoracemes,<br />

the flowering branches 15 to 50 cm. long, slender, sometimes<br />

bearing a few reduced blades or more, usually the leaves reduced<br />

to spinelike petioles, the pedicels 5 to 10 mm. long, very slender;<br />

flowers red; calyx tube cylindric, 2 to 4 cm. long, 3 to 5 mm. wide at<br />

throat, ventricose at base; sepals narrowly oblong, 1.5 to 2 cm. long,<br />

3 to 4 mm. wide, obtuse; petals similar to the sepals, slightly shorter<br />

and narrower; corona filaments in 2 series, the outer dolabriform, 3<br />

to 4 mm. long, verrucose along one side, the inner filiform, about 0.8<br />

mm. long, capitellate; operculum borne near base of tube, membranous,<br />

erect, about 1 cm. long, fimbrillate in upper half; ovary ellipsoidal,<br />

minutely puberulent.<br />

TYPE LOCALITY: Rupununi River, British Guiana.<br />

DISTRIBUTION: Eastern and southern Venezuela, British Guiana<br />

and northern Brazil.

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