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478 FIELD MUSEUM OF NATURAL HISTORY BOTANY, VOL. XIX Stem densely and softly villous or pilosulous with hairs averaging less than 2 mm. long, or glabrous. Leaves pubescent on one or both surfaces. Plant diffusely branched; leaves rarely more than 2.5 cm. long, hastate s. parvifolia. Plant few-branched; leaves more than 2.5 cm. long. Stem very slender, minutely white-pilosulous; leaves very thin, glabrous above t. tepicana. Stem coarser; leaves thicker, pubescent above. Stem softly villous or pilosulous Stem glabrous or very sparingly pilose. Leaves glabrous. aa. Maxoni. Leaves subhastate, the basal lobes more than half as long as the middle lobe, usually bilobate. bb. subpalmata. Leaves strictly hastate, the basal lobes less than half as long as the middle lobe, not lobed. Under side of leaves densely and softly pilosulous; basal lobes broadly ovate or orbicular-ovate in general outline cc. mayarum. Under side of leaves hirsutulous; basal lobes oblong in general outline dd. salvadorensis. Leaves 5-lobed ee. hibiscifolia. Leaves 3-lobed or subentire. Basal leaf lobes much longer than broad ff . ciliata. Basal leaf lobes slightly, if at all, longer than broad, or almost wanting. Leaves definitely hastate gg. nicaraguensis. Leaves narrowly lanceolate or obscurely hastate. hh. subintegra. Key to the varieties of P. foetida in Florida and the West Indies Ovary pubescent; fruit sparingly to densely pubescent, less than 2.5 cm. in diameter, yellowish. Stem, petioles, and peduncles hirsute with spreading, yellowish or brownish hairs averaging more than 1.5 mm. long. a. P. foetida (typical).
AMERICAN PASSIFLORACEAE 479 Stem, petioles, and peduncles softly pilosulous, the hairs averaging not more than 1.5 mm. long, usually much less. Basal lobes of leaves not lobed, suborbicular; leaf lobes apiculate. b. gossypifolia. Basal lobes of leaves prevailingly bilobate; leaf lobes rounded Ovary glabrous. at apex i. santiagana. Plant densely hispid-hirsute throughout; segments of bracts closely interwoven; fruit not more than 2.5 cm. in diameter, yellowish 1. hispida. Plant essentially glabrous throughout; segments of bracts straight, or at least not closely interwoven; fruit more than 2.5 cm. in diameter, red or scarlet. Bracts at least 2.5 cm. long at anthesis, at length as long as the fruit. Basal leaf lobes oblanceolate or oblong-lanceolate cc. ciliata. . Basal leaf lobes suborbicular jj. riparia. Bracts less than 2.5 cm. long at anthesis, rarely as much as 3 cm. long at fruiting time. Basal leaf lobes bilobate kk. quinqueloba. Basal leaf lobes not lobed 11. polyadena. Key to the varieties of P. foetida in South America Ovary pubescent; fruit sparingly to densely pubescent. Sinus between the middle lobe and the basal lobes of the leaves acute or subacute, the middle lobe irregularly, often deeply, lobed (Uruguay, Paraguay, and Argentina) h. vitacea. Sinus between the middle lobe and the basal lobes of the leaves shallow, obtuse, the middle lobe not lobed. Stem, petioles, and peduncles hirsute with spreading, rather stiff, yellowish or brownish hairs averaging more than 1.5 mm. long a. P. foetida (typical). Stem, petioles, and peduncles softly pilosulous, the hairs averaging not more than 1.5 mm. long, usually less. Leaves evenly serrate, often 5-lobed (Paraguay, Uruguay, and Argentina) e. nigelliflora. Leaves undulate, crenulate, or subentire, never 5-lobed. Bracts twice or thrice pinnatisect, the segments much longer than the width of the main rachis b. gossypifolia.
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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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