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578 FIELD MUSEUM OF NATURAL HISTORY BOTANY, VOL. XIX Ega. Under D. acuminata a single collection is cited, Spruce 1320-3, from the forests of Barra. In the Flora Brasiliensis the Martius specimen is cited under D. acuminata, not under D. retusa. There is no description of the fruit of D. retusa in the description in the Flora Brasiliensis, but the fruit of D. acuminata is described in much detail, and the accompanying figure of this species shows a leaf and a single large fruit, which agree perfectly with the description. Both of the Spruce specimens, the types of these two species, are without fruit. Hence it is probable that the Martius specimen, which I have not seen, is a plant in fruit and is the original of the drawing in the Flora Brasiliensis, and that its citation under D. retusa in the Transactions was an inadvertent error. The lateral nerves of the leaf figured in the Flora Brasiliensis as D. acuminata are much more ascending than in the Spruce type and they irregularly anastomose toward the margin, in these respects resembling D. Wallisii. Perhaps too much importance has been given to the matter of nervation, for there is some variation in the specimens I am referring to D. Wallisii, even in individual specimens. 1 am assuming for the present that the illustration in question applies to D. acuminata. 5. Dilkea Wallisii Mast, in Mart. Fl. Bras. 13, pt. 1: 622. pi. 106, f. 3. 1872. High-climbing, woody vine, glabrous throughout; petioles 1.5 to 3.5 cm. long, glandless or bearing near apex 2 sessile, oblong glands 2 to 2.5 mm. long; leaves variable in outline, broadly ovate, ovateoblong, or oblong-oblanceolate, 12 to 15 cm. long, 5 to 10 cm. wide, abruptly acuminate at the rounded apex, rounded or cuneate at base, coriaceous, lustrous, the lateral nerves ascending, irregularly anastomosing near the margin; flowers white, in sessile glomerules or short-spicate, the pedicels 1 to 1.5 cm. long; sepals 4, at first united below middle into a cylindric funnel-shaped tube, soon or rather tardily separating to the base, oblong, 2.5 to 3 cm. long, the 2 outer about 1 cm. wide, the 2 inner about 5 mm. wide; petals 4, about as long as the sepals; corona in 2 series, the outer filamentose, the filaments narrowly ligulate, 2 to 2.2 cm. long, the inner membranous at base, filiform below the middle, spatulate-dilated in the upper half and margined with floccose, crispate threads; stamen filaments filiform, 2 to 2.5 cm. long; anthers narrowly linear; ovary ovoid, short-stipitate, the stipe 3 to 4 mm. long; fruit depressedspherical, up to 2.5 cm. long, and 4.5 cm. in diameter.
AMERICAN PASSIFLORACEAE 579 TYPE LOCALITY: Brazil (described from a drawing made by G. Wallis). ILLUSTRATION: Mart. Fl. Bras. 13, pt. 1: pi. 106, /. 3. DISTRIBUTION: Amazonian basin of Venezuela, Peru, and Brazil. VENEZUELA: Amazonas: San Carlos, Rio Negro, Holt & Gehriger 292 (N). PERU: Loreto: Florida, Rio Putumayo, at mouth of Rio Zubineta, King 2100 (N). BRAZIL: Para: Obidos, Ducke 16940 (Gen, N). Para, Ducke 21307 (K, N, Ut). This species was proposed by Masters in an addendum to the main treatment in the Flora Brasiliensis, and was based upon a painting made by Wallis and reproduced in the monograph. Masters gave no description, merely saying that the species differed from the other two in the form of the leaves and the nature of the inflorescence. The specimens cited above exhibit great diversity in leaf shape, a point mentioned by Ducke. Some of the leaves certainly show Httle resemblance to those figured by Masters. The Peruvian collection is referred here with much hesitation; it may represent D. acuminata or an undescribed species. The leaves are exactly oblanceolate, tapering from well above the middle to the base, and there is almost no distinct petiole. The blades are 28 to 37 cm. long and 9.5 to 14 cm. wide at the widest point. Their nervation agrees well with specimens of D. Wallisii at hand, and the flowers do not show any important differences. Klug states that his specimens were from a tree about 3 meters high, whereas Ducke emphasizes the fact that D. Wallisii is a vine climbing very high. Mature fruit of the Peruvian plant is necessary. NEW SPECIES, VARIETIES, COMBINATIONS, AND NAMES PAGE Dilkea parviflora Killip, sp. nov 575 Passiflora andina Killip, nom. nov 256 Rathea floribunda Karst., not Passiflora floribunda Tr. & Planch. Passiflora arida var. pentaschista Killip, var. nov 470 Passiflora arida var. cerralbensis Killip, var. nov 470 Passiflora canescens Killip, sp. nov 416 Passiflora cirrhipes Killip, sp. nov 522
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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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336 FIELD MUSEUM OF NATURAL HISTORY
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Page 296: UNIVERSITY OF ILLINOIS-URBANA
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