Watson's dutchman's pipe, more...
[Aristolochia porphyrophylla H. Pfeifer]
Eugene, (Gene) Sturla
Herbs , procumbent, to 0.5 m. Young stem smooth, glabrous. Leaves: petiole 0.4-1 cm. Leaf blade lanceolate, 8 × 5 cm, base strongly sagittate, sinus depth 0.5-2 cm, apex acuminate to acute; surfaces abaxially tomentose to tomentulose; venation pinnate. Inflorescences on new growth, axillary, solitary flowers; peduncle bracteolate, to 1 cm; bracteoles lanceolate, to 6 mm. Flowers: calyx brown-purple, straight to curved; utricle angled upward, ovoid to narrowly ellipsoid, 0.6-0.7 × 0.5 cm; syrinx tubular, 1.5 mm; tube angled upward, cylindric, 1 × 0.3 cm; annulus absent; limb orangish with maroon spots, 1-lobed, lobe ovate, 1-6 × 0.6 cm, pilose; gynostemium 5-lobed, crown-shaped, 1-4 mm; anthers 5; ovary 5-locular, to 1 cm. Capsule ovoid to obovoid, 1.5 × 1-2 cm, dehiscence acropetal; valves 5; septa entire, not attached to valves. Seeds flat, triangular, 0.3-0.4 × 0.4 mm. Flowering spring-summer. Rocky slopes; 50-1000 m; Ariz., N.Mex.; Mexico.
Plant: Herbaceous perennial vine; woody taproot; stems prostrate Leaves: linear-lanceolate to ovate, with cordate, sagittate, to hastate bases, puberulent, often purplish INFLORESCENCE: axillary, solitary flowers Flowers: pedunculate, with an ovate bracteole to 4 mm long; calyx tubular, brownish purple, zygomorphic, with 1 sepal lobe elongated, the mouth flaring; stamens 5; pistil 5-carpelled Fruit: FRUITS cylindrical, dehiscent, valved capsules, 1.5-2.5 cm long, 1-1.5 cm wide. SEEDS black, triangular, ca. 4 mm wide, and long, numerous Misc: Sandy roadsides and washes of open and canyon areas; 300-1450 m (1000-4800 ft); Mar-Dec Notes: Flowers have a fetid odor.Leaves can be purple underneath.Seeds triangular in shape, black.Capsule septacidal. References: Mason, Charles T., Jr. 1999. Aristolochiaceae. Ariz.-Nev. Acad. Sci. 32(1).