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birdwing passionflower

Stems

terete, sparsely hairy, (bark not corky).

Leaves

not pungent, glabrous or subglabrous to short-hairy, not soft-hairy;

stipules linear-subulate, 2–5 × 0.5–1 mm, eglandular;

petiole glandular, glands cuplike;

blade roughly symmetric, 2–7 × 2.5–16 cm, as wide as to usually wider than long, 3–9-lobed, primary lobes 3 and often further lobed, lobes acute, middle primary lobe much shorter than to ± as long as lateral 2 primary lobes, margins entire;

abaxial fine veins moderately to prominently raised, abaxial nectaries usually absent, sometimes present near leaf margins but not forming lines.

Flowers

floral tube absent;

sepals green, 6–10 × 2–4 mm;

petals absent;

corona filament whorls 2, outer filaments purple basally, yellow apically, or yellow throughout, linear, terete to slightly transversely compressed, 3–7 mm.

Berries

dark blue to black, globose to dorsiventrally compressed, 6–12 × 6–12 mm.

Floral

bracts obscure, linear-subulate, 1 × 0.2–0.5 mm, margins entire, eglandular.

2n

= 24.

Passiflora tenuiloba

Phenology Flowering Apr–Aug(–Dec).
Habitat Open oak-juniper or coastal woodlands and savannas, grasslands and semideserts, primarily over limestone
Elevation 30–900 m [100–3000 ft]
Discussion

E. P. Killip (1938) and W. C. Martin and C. R. Hutchins (1980) incorrectly indicated that Passiflora tenuiloba is native to New Mexico. This is based upon the misinterpretation of confusing labels on old specimens (see D. H. Goldman 2004).

Passiflora tenuiloba has the most variable leaves of any species in the genus. They vary considerably in texture, color, indument, lobe length and number, and petiole-gland size and shape, not only between populations but also within individual plants.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Distribution
from FNA
TX; Mexico (Coahuila, Nuevo León, Tamaulipas)
[WildflowerSearch map]
[BONAP county map]
Parent taxa Passifloraceae > Passiflora
Sibling taxa
P. affinis, P. arida, P. arizonica, P. biflora, P. bryonioides, P. caerulea, P. ciliata, P. filipes, P. foetida, P. incarnata, P. lutea, P. mexicana, P. multiflora, P. pallens, P. pallida, P. sexflora, P. tarminiana
Name authority Engelmann: Boston J. Nat. Hist. 6: 192. (1850)
Source Flora of North America vol. 6, p. 176.
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