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558 FIELD MUSEUM OF NATURAL HISTORY BOTANY, VOL. XIX BRITISH GUIANA: Kukenam River, Im Thurn 84 (EG, EM, K, N). Mt. Roraima, G. H. H. Tate 207 (Y). BRAZIL: Amazonas: Rio Branco, Kuhlmann 2803 (Bo, Go, K, N, S, Ut). Para: Lago do Salgado, near Rio Trombetas, Ducke 16968 (B, G, Gen, Go, type, N, S). Upper Cupary River, Krukoff 1141 (Gen, Y). The foliage of P. longiracemosa is much like that of P. fuchsiiflora, the shape of the leaves showing the same variation. The arrangement of the inflorescence of the two is very different. From other species with a racemose inflorescence P. longiracemosa is readily distinguished by the very thick leaves, which are strongly glaucous beneath. 349. Passiflora securiclata Mast. Kew Bull. 1893: 12. 1893. Tacsonia spinescens Klotsch in Schomb. Reise Brit. Guian. 1168. 1848, name only. Passiflora retrorsa <strong>Killip</strong>, Journ. Wash. Acad. Sci. 14: 116. 1924. Subscandent, glabrous shrub, the tendrils usually reduced to recurved spines 1 to 1.5 cm. long; stipules setaceous, soon deciduous; petioles 1 to 1.5 cm. long, those of reduced leaves on floriferous branches 2 to 4 mm. long; leaves of main branches narrowly oblong, ovate-oblong, or oblong-lanceolate, 6 to 12 cm. long, 2 to 5.5 cm. wide (those of floriferous branches oval, 2.5 to 3.5 cm. long, 1.5 to 3 cm. wide), obtuse, usually emarginate, rarely bluntly short-acuminate, rounded at base, penninerved (principal lateral nerves 8 or 9 to a side), plainly reticulate-veined, coriaceous or subcoriaceous, concolorous, lustrous on both surfaces; inflorescence in pseudoracemes, the flowering branches 15 to 50 cm. long, slender, sometimes bearing a few reduced blades or more, usually the leaves reduced to spinelike petioles, the pedicels 5 to 10 mm. long, very slender; flowers red; calyx tube cylindric, 2 to 4 cm. long, 3 to 5 mm. wide at throat, ventricose at base; sepals narrowly oblong, 1.5 to 2 cm. long, 3 to 4 mm. wide, obtuse; petals similar to the sepals, slightly shorter and narrower; corona filaments in 2 series, the outer dolabriform, 3 to 4 mm. long, verrucose along one side, the inner filiform, about 0.8 mm. long, capitellate; operculum borne near base of tube, membranous, erect, about 1 cm. long, fimbrillate in upper half; ovary ellipsoidal, minutely puberulent. TYPE LOCALITY: Rupununi River, British Guiana. DISTRIBUTION: Eastern and southern Venezuela, British Guiana and northern Brazil.
AMERICAN PASSIFLORACEAE 559 BRITISH GUIANA: Schomburgk 403 (K). Rupununi River, Jenman 5535 (K, type); Schomburgk 377 (B, type of Tacsonia spinescens). Nappi River, Kanuku Mountains, Myers 5374 (K). VENEZUELA: Banks of Rio Orinoco, Chaffanjon (P). Delta Amacuro: Vuelta Triste, Rio Manino, Bond, Gillin & Brown 147 (Ph, type of P. retrorsa). Angostura: Ciudad Bolivar, Holt & Gehriger 196 Amazonas: Rio Cassiquiare, Humboldt & Bonpland (BW, (N, Y). No. 12394). San Carlos, Schwyn 711 (B). Puerto Ayacucho, Holt & Blake 800 (N). BRAZIL: Amazonas: Rio Branco, Ule 7707 (B). In the type specimens of P. securiclata and P. retrorsa the flowers are detached, and an accurate description of the inflorescence has not been possible until the more adequate material collected by the National Geographic Society's expedition to Venezuela became available. There is a general resemblance between this species and P. spinosa, but the leaves are much blunter and of thinner texture and the corona filaments are dilated. 350. Passiflora spicata Mast, in Mart. Fl. Bras. 13, pt. 1: '576. pi. 109. 1872. Erect shrub, the tendrils reduced to spines; plant essentially glabrous throughout except the flowers; stipules soon deciduous; petioles 0.5 to 1 cm. long, biglandular at apex, the glands slightly elevated; leaves oblong, 10 to 15 cm. long, 5 to 8 cm. wide, abruptly acuminate (tip about 1 cm. long), rounded at base, penninerved (principal lateral nerves 5 or 6 to a side), coriaceous or subcoriaceous; inflorescence pseudoracemose, the rachis up to 6 cm. long, 4-6- flowered, subangular, the pedicels up to 5 mm. long; flowers scarlet; calyx tube cylindric, 3 to 3.5 cm. long, 0.8 to 1 cm. wide at throat, ventricose at base, densely rufo-tomentulous; sepals oblong, 2 to 2.5 cm. long, 8 to 10 mm. wide, obtuse, subcoriaceous; petals slightly shorter and narrower than the sepals; corona filaments in 3 series, the outermost falcate, strongly dilated at middle, 8 to 10 mm. long, smooth at margin, those of the 2 inner series liguliform, 4 to 5 mm. long; operculum borne near base of tube, about 10 mm. high, filamentose nearly to base; ovary oblong, villosulous. TYPE LOCALITY: Rio Japura, Amazonas, Brazil by Martius). ILLUSTRATION: Mart. Fl. Bras. 13, pt. 1: pi. 109. DISTRIBUTION: Upper Amazon basin, Brazil. (type collected
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THE UNIVERSITY OF ILLINOIS
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THE AMERICAN SPECIES OF PASSIFLORAC
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PRINTED IN THE UNITED STATES OF AME
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UNIVERSITY OF ILLINOIS-URBANA
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