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562 FIELD MUSEUM OF NATURAL HISTORY BOTANY, VOL. XIX nerves 7 or 8 to a side), coriaceous, lustrous; inflorescence racemose or pseudoracemose, the racemes up to 25 cm. long, slender, sometimes foliferous, the pedicels solitary or in pairs, 3 to 5 mm. long; calyx tube cylindric, 4 to 5 cm. long, 6 to 8 mm. wide, slightly ventricose at base, bright red without, paler within; sepals narrowly oblong, about 1 cm. long, 3 mm. wide, obtuse, bright red; petals similar and subequal to the sepals; corona filaments in 2 series, yellow, the outer dolabriform, 3.5 to 4 mm. long, dilated at middle, filiform at apex, slightly verrucose along one margin, the inner filaments filiform, about 1 mm. long; operculum borne about 1 cm. above base of tube, erect, membranous, pinkish yellow, filamentose in upper third; ovary narrowly oblong, minutely puberulent. TYPE LOCALITY: Yurimaguas, Peru. ILLUSTRATIONS: Poepp. & Endl. Nov. Gen. & Sp. 2: pi. 181; (?)Vellosia 3, pt. I: pi. 11. DISTRIBUTION: Colombia; Amazon basin of Peru and Brazil, at low elevations. COLOMBIA: Mutis 3461 (Ma). Santander: Margarita Creek, Magdalena Valley, Haught 1430 (N). Antioquia: Guadual, Kalbreyer 1402 (B, K). PERU: Loreto: Yurimaguas, Poeppig D.2187 (V, type). Between Yurimaguas and Balsapuerto, Kittip & Smith 28147 (N, Y). Caballo-cocha, Rio Amazonas, L. Williams 2458 (F, N). Upper Rio Nanay, L. Williams 1134 (N). BRAZIL: Amazonas: Manaos, Spruce 1394, in part (K, P). Jurua, Ule 5110 (B), 5832 (B, Gen, Go). Caracarahy, Rio Branco, Kuhlmann 3035 (B, Go, N). Para: Rio Branco de Obidos, Ducke 21322 (B, N, Ut). This is the earliest described species within the subgenus Botryastrophea, and here the first note was made of the frequent reduction of tendrils to spines. I can find no differences between the Colombian specimens listed above and typical P. spinosa from northern Peru. This constitutes an interesting extension of range. Rio Ducke 21322 agrees closely with the illustration of Tacsonia coccinea Barb. Rodr. (which should not be confused with Passiflora coccinea Aubl.), but I am not satisfied that they should be referred to P. spinosa. The flowers are borne on short branches, not in elongate racemes; their structure, however, appears to be identical with that in P. spinosa.
AMERICAN PASSIFLORACEAE 563 354. Passiflora Rusbyi Mast. Bull. Torrey Club 17: 282. 1890. Scandent shrub, the tendrils present or reduced to short spines; plant glabrous throughout, except the flowers; petioles up to 2.5 cm. long, glandless; leaves oblong-lanceolate, 10 to 18 cm. long, 4 to 7 cm. wide, acuminate, rounded at base, penninerved (principal lateral nerves 7 to 9 to a side), membranous; inflorescence pseudoracemose, the rachis up to 25 cm. long, floriferous in upper third, bearing reduced, linear-oblong or linear-spatulate leaves about 1 cm. long, and 2.5 mm. wide; calyx tube narrowly cylindric, 2 to 3 cm. long, puberulent, at length glabrate without, red or red-orange; sepals oblong, 1 to 1.3 cm. long, obtuse, coriaceous, red or red-orange; petals slightly shorter than the sepals; corona filaments in 2 series, the outer narrowly linear, 4 to 5 mm. long, capitellate, yellow, the inner filiform, about 2 mm. long; operculum borne just below middle of tube, membranous, erect, filamentose in upper third; ovary oblong, puberulent. TYPE LOCALITY: Junction of Beni and Madre de Dios rivers, Bolivia. DISTRIBUTION: Upper Amazon basin, Bolivia and Brazil. BOLIVIA: Beni: Junction of Beni and Madre de Dios rivers, Rusby 2089 (Y, type). BRAZIL: Amazonas: Humayta, Rio Madeira basin, Krukoff 6191 (Y), 6503 (Y), 6759 (Y). Rio Embira, Krukoff 4941 (N). Acre: Rio Macauhan, Krukoff 5730 (Gen, Y). In this species the leaves are shaped much like those of P. spinosa, though they are of much thinner texture. The outer corona filaments are merely capitellate at the apex, not strongly hatchet-shaped as in P. spinosa. Petiolar glands, quite evident in P. spinosa, are wanting in P. Rusbyi. The flowers are said to be orange, whereas in P. spinosa they are bright red. Krukoff 4941, in fruit, is tentatively referred here. The leaves are proportionately narrower than in the type, about 20 cm. long and 5 cm. wide. The fruit is subglobose, 4 to 5 cm. in diameter, yellowish, and glabrescent. The obovate, reticulate seeds are very large (14 mm. long, 9 mm. wide). RELATIONSHIP UNCERTAIN 355. Passiflora heterohelix <strong>Killip</strong>, sp. nov. Figure 2, a. Planta herbacea, scandens, glaberrima; cirrhi axillares et in pedunculis; stipulae setaceae; petioli biglandulosi folia ; oblonga vel
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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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