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520 FIELD MUSEUM OF NATURAL HISTORY BOTANY, VOL. XIX narrowed at the base, entire, penninerved (nerves about 12 to 14 to a side, the midnerve biglandular with scarlike glands close to its base), membranous, glabrous above, light yellowish green beneath, hirsutulous beneath, especially on nerves and veins; peduncles 2.5 to 3.5 cm. long, once dichotomous, the common peduncle and the branches subequal, densely hirsutulous; bracts subulate, 1.5 to 2 mm. long, soon deciduous; calyx tube campanulate, about 1 cm. long and 1 cm. in diameter at the throat, densely hirsutulous without; sepals linearoblong, about 3 cm. long, 9 to 10 mm. wide, hirsutulous without, greenish without, white within; petals similar to the sepals, about 2.5 cm. long and 7 mm. wide, glabrous, white; corona filaments dark brown, puberulent, in 5 series, the outermost 1.5 cm. long, laterally compressed, dolabriform, crenulate along the dilated part, subacute, the filaments of the second series ligulate, 6 to 7 mm. long, those of the other 3 series filiform, successively shorter, 4 to 1 mm. long; operculum tubular, erect, about 1 cm. high, exserted, erose, reddish; ovary ovoid, sulcate, truncate at apex, densely hirsute-tomentose. Type in the United States National Herbarium, No. 1,662,988, collected in the Carare Valley, near Puerto Berrio, Department of Santander, Colombia, 100 to 700 meters, April 12, 1935, by Oscar Haught (No. 1635}. Astrophea is a well marked subgenus of Passiflora, and were certain of the subgenera of Passiflora given full generic rank, Astrophea would merit such treatment. Many of the species are true trees or shrubs, with no vestige of a climbing habit; others are suberect, with the tendrils reduced to coarse spines; still others apparently are true tendril-bearing vines. Six fairly well defined sections may be recognized; for three of these Harms has proposed the names Euastrophea, Pseudoastrophea, and Botryastrophea; three new sections are now being added. There is considerable difficulty in separating the various species within these sections. Nearly all of them are quite rare, or, at least, infrequently collected, several being known only from the single type collection. Field notes are scant, and herbarium material often does not show well the form of the corona and operculum, in which often lie distinguishing characters between the species. Further field study and the assembling of more material will doubtless modify the treatment here given, in which I have maintained most of the known species, even though at times the differentiating characters are rather insignificant. the
AMERICAN PASSIFLORACEAE 521 Passiflora Haughtii and P. Pittieri differ from other species of Astrophea in having a long operculum, well exserted beyond the throat of the calyx tube, and somewhat resembling the inner rank of the corona of P. glandulosa. It seems best to place these two species in a new section of Astrophea, which may be called Dolichostemma. Passiflora Haughtii, according to the collector's notes, is a large liana; no tendrils are present on specimens collected. Passiflora Pittieri is described as a small tree or a shrub; the specimens bear weak tendrils. Doubtless the habit of the two is similar. 309. Passiflora Pittieri Mast. Bot. Gaz. 23: 246. 1897. Small tree or shrub, with weak tendrils sometimes present at the ends of the branches; branches angulate, striate, minutely puberulent or glabrescent; stipules linear-subulate, 2 to 3 mm. long; petioles strongly grooved, puberulent, 1 to 1.5 cm. long, bearing at apex 2 inconspicuous, flattened glands; leaves oblong or obovate, 8 to 10 cm. long, 4 to 6 cm. wide, entire, abruptly acuminate at apex, cuneate at base, penninerved (lateral nerves 6 or 7 to a side), glabrous, subcoriaceous; peduncles solitary, once or twice bifurcate, the pedicels articulate above middle; bracts setaceous, 1.5 to 2 mm. long; flowers 5.5 to 6 cm. wide; calyx tube cylindric-campanulate, 8 to 10 mm. long, 6 to 7 mm. in diameter at throat; sepals oblong, 3.5 to 4 cm. long, about 8 mm. wide, obtuse, slightly fleshy; petals linear-oblong, 2.5 cm. long, about 7 mm. wide, thinner than the sepals; corona filaments in 5 series, the outermost subdolabriform, 1.5 cm. long, dilated near apex to a width of 2 mm. tapering gradually to base, those of the second series spatulate, 5 mm. long, 1 mm. wide, those of the succeeding series gradually shorter, filiform; operculum membranous, arising just below the throat of the tube, erect, about 6 mm. high, partially exserted, minutely denticulate; ovary oblong, densely ferruginous-tomentose. TYPE LOCALITY: Santo Domingo, Golfo Dulce, Costa Rica. DISTRIBUTION: Known only from the type locality, Pacific coastal region of Costa Rica. COSTA RICA: Santo Domingo, Golfo Dulce, Pittier 989b (J. D. Smith 7031; K, type, N). This is the only species of Astrophea found outside of South America. It, with the last preceding species, differs from other members of Astrophea in having a long-tubular operculum, which is borne near the throat of the calyx tube and is partially exserted beyond the throat.
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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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. COSTA 364 FIELD MUSEUM OF NATURAL
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4. 574 FIELD MUSEUM OF NATURAL HIST
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LIST OF EXSICCATAE The numbers in p
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Synonyms in italics. INDEX Page num
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UNIVERSITY OF ILLINOIS-URBANA
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