Flora of North America species comparison

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Datura innoxia

Datura ceratocaula

angel's-trumpet, downy thorn-apple, Indian-apple, pricklyburr

Latin thorn-apple, Mexican thorn-apple
Habit Herbs perennial, to 10 dm, roots tuberous. Herbs annual, to 8 dm.
Stems

usually villous-pubescent, sometimes glabrous.

glabrous.
Leaf

blades ovate, to 22 × 16 cm, margins entire or irregularly sinuate-dentate, surfaces villous to glabrescent, (trichomes spreading, often more dense along veins, sometimes glandular).

blades narrowly ovate to lanceolate, to 15 × 8 cm, margins sinuate to pinnately lobed, abaxial surface tomentose, adaxial surface glabrous.
Flowers

calyx villous along veins, hairs spreading, tube cylindric, 5-toothed;

corolla white, sometimes lavender- or purple-tinged, funnelform, 10–22 cm, sparsely hairy, glabrescent, acuminate lobes alternating with lobules of similar size.

calyx glabrous, tube split along 1 side, appearing spathe-like and with poorly defined unequal teeth;

corolla white with red-purple hues, trumpet-shaped surface usually waxy, 11.5–20 cm, acuminate lobes alternating with smaller lobules.
Capsules

pendent, irregularly dehiscent, pericarp fleshy, hairy, with prickles 10 mm;

calyx remnant slightly accrescent.

pendent, irregularly dehiscent, pericarp fleshy, glabrous, without prickles or tubercles;

calyx remnant not accrescent.
Seeds

brown, 4–6 mm, convex marginal ridge present, testa smooth;

caruncle present.

black, 3.5–5 mm, convex marginal ridge absent, testa finely pitted;

caruncle present.
2n

= 24.

= 24.

Datura innoxia

Datura ceratocaula
Phenology Flowering Jul–Oct. Flowering Jul–Sep.
Habitat Streamsides, road and trail margins, waste places, desert shrublands, grasslands. Seasonal ponds, livestock ponds, ditches, desert grassland-shrublands.
Elevation 0–2000 m. (0–6600 ft.) 1300–1400 m. (4300–4600 ft.)
Distribution
from FNA
AL; AR; CT; DC; FL; GA; IL; IN; KS; KY; MD; MI; MO; MS; NC; NJ; NM; NY; OH; OK; PA; SC; TN; TX; WI; WV; ON; QC; SK; Mexico; Central America; West Indies; n South America (Colombia, Ecuador, Venezuela) [Introduced nearly worldwide]
[WildflowerSearch map]
from FNA
NM; Mexico [Introduced in North America]
[BONAP county map]
Discussion

Datura innoxia is native to Texas and possibly New Mexico. Elsewhere in the flora area, it is widely introduced as an ornamental and, inadvertently, as a weed.

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

The caruncle of Datura ceratocaula usually does not detach from the seed (as it does in the case of seeds of other species), and swells and becomes sticky when wetted. In this way, the seeds are adapted to dispersal by aquatic birds and livestock. In New Mexico, D. ceratocaula is known only from Hildago County.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 14. FNA vol. 14.
Parent taxa Solanaceae > Datura Solanaceae > Datura
Sibling taxa
D. ceratocaula, D. discolor, D. ferox, D. metel, D. quercifolia, D. stramonium, D. wrightii
D. discolor, D. ferox, D. innoxia, D. metel, D. quercifolia, D. stramonium, D. wrightii
Synonyms D. meteloides
Name authority Miller: Gard. Dict. ed. 8, Datura no. 5. (1768) — (as inoxia) Ortega: Nov. Pl. Descr. Dec., 11. (1797)
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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