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540 FIELD MUSEUM OF NATURAL HISTORY BOTANY, VOL. XIX This species is characterized by the unusual form of the operculum, which is regularly lobed about one-third its length; the lobes are ovate-spatulate. Poeppig and Endlicher describe the operculum as being in two series, the outer (upper) filamentose and the inner (lower) a lobate, incised-dentate membrane, but this structure is not shown either by the type specimen or by the Ducke one, which is in fine condition for study. Passiflora Guedesii, described from material collected farther down the Amazon, appears conspecific with P. Candida, as pointed out by Ducke. The leaves are proportionately longer, but the peculiar form of the operculum is the same. 328. Passiflora hexagonocarpa Barb. Rodr. Vellosia 1: 24. 1891; 3, pt. 1: pi. 9. 1891. Scandent shrub with a few tendrils, essentially glabrous throughout, only the ovary pubescent; petioles 1.5 to 2 cm. long; leaves ovate-lanceolate or oblong-lanceolate, 5 to 8 cm. long, 2 to 5 cm. wide, obtuse, rounded at base, penninerved (lateral nerves 6 to 8 to a side, the midnerve biglandular at base), coriaceous, bright green and lustrous on both surfaces, prominently reticulate; peduncles solitary, 1 to 3 cm. long; calyx tube broadly funnel-shaped, 2 to 2.5 cm. long, nearly 2 cm. wide at throat; sepals ovate-lanceolate, 1.5 to 2 cm. long, about 1 cm. wide at base, subobtuse, conspicuously nerved, green without, white within; petals oblong, slightly shorter than the sepals, the outer narrowly linear, about white; corona filaments in 2 series, 1 cm. long, enlarged on one side near apex, short-attenuate at apex, verrucose along the margin of the enlarged portion and the apex, the inner filaments few, tuberculiform, less than 1 mm. long; operculum borne about 6 mm. above base of tube, erect, 2 mm. high, flabellatelobed and irregularly lacerate-fimbriate; ovary narrowly ovoid, densely rufo-tomentulous; fruit ovoid, 7 to 8 cm. long, about 4 cm. in diameter, sharply 6-angled, minutely and scantily puberulent; seeds oblong-obovate, about 5 mm. long and 3 mm. wide, coarsely reticulate, the axis slightly curved. TYPE LOCALITY: Manaos, Brazil. ILLUSTRATION: Vellosia 3, pt. 1: pi. 9. DISTRIBUTION: Upper Amazonian Brazil. BRAZIL: Amazonas: Parintins, Ducke 2404$ (N, Ut). Until recently collected by Dr. Ducke, in both flower and fruit, this species was known only from Barbosa's description and excellent
AMERICAN PASSIFLORACEAE 541 illustration. The shape of the calyx tube and the curious operculum are much as in P. Candida. It differs from P. Candida, however, in having the corona only 2-ranked, the outer filaments being enlarged close to the apex, not at the middle, and the inner ones reduced to a few tubercles. LOCAL NAME: "Maracuya-rana." 329. Passiflora citrifolia (Juss.) Mast. Trans. Linn. Soc. 27: 629. 1871; in Mart. Fl. Bras. 13, pt. 1: 544. 1872. Tacsonia citrifolia Juss. Ann. Mus. Hist. Nat. 6: 392. 1805. Distephana citrifolia M. Roemer, Fam. Nat. Syn. 2: 199. 1846. Subscandent shrub (?), glabrous throughout except the ovary; stem terete, strongly striate; stipules narrowly linear, soon deciduous; petioles 1.5 to 3 (or up to 5?) cm. long, biglandular at apex, the glands sessile, saucer-shaped; leaves oblong or ovate-oblong, 12 to 20 cm. long, 5 to 11 cm. wide, abruptly short-acuminate, rounded at base, penninerved (principal lateral nerves 8 or 9 to a side, strongly arcuate toward the margin), prominently reticulate, coriaceous, pale green and sublustrous, margined with a conspicuous, narrow, dark brown or blackish band; peduncles about 4.5 cm. long, slender; calyx tube apparently cylindric-funnel-shaped, about 1 cm. long; corona filaments in 4 series, the outermost clavate, erect, those of the next 2 series successively shorter, one-third to one-fifth as long, filiform, the innermost capillary, paler, reflexed; ovary ovoid, densely shortwhite- villous; fruit ovoid, glabrous. TYPE LOCALITY: Probably French Guiana. DISTRIBUTION: Probably French Guiana. FRENCH GUIANA: Cayenne, Leprieux in 1850 (P); Perrottet in 1821 (Gen);Sagofinl857 (K). None of these specimens has good flowers, and the material that Jussieu had at hand was so poor that he said he proposed the species with much hesitation. The specimens here cited seem to represent a well marked species, however, apparently not described under any other name subsequently. It is most readily recognized by the dark margin of the leaves. Because of the unsatisfactory condition of the flowers, its exact position cannot be readily determined. The Sagot specimen at Kew, from which the description of the corona given above is derived, indicates that the general relationship is with P. deficiens and P. costata.
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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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