Flora of North America species comparison

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Aristolochia watsonii

Indian-root, Watson's Dutchman's pipe
Habit Herbs, procumbent, to 0.5 m. Young stem smooth, glabrous.
Leaves

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.

Aristolochia watsonii
Phenology Flowering spring–summer.
Habitat Rocky slopes
Elevation 50-1000 m (200-3300 ft)
Distribution
from FNA
AZ; NM; Mexico
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 3.
Parent taxa Aristolochiaceae > Aristolochia
Sibling taxa
A. californica, A. clematitis, A. coryi, A. erecta, A. macrophylla, A. maxima, A. pentandra, A. reticulata, A. serpentaria, A. tomentosa, A. wrightii
Synonyms A. porphyrophylla
Name authority Wooton & Standley: Contr. U.S. Natl. Herb. 16: 117. (1913)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Fabaceae, Apiaceae, Boraginaceae, and Polemoniaceae.)

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