Flora of North America species comparison

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Eysenhardtia orthocarpa

Eysenhardtia spinosa

Tahitian kidneywood

spiny kidneywood
Habit Shrubs, to 1 m. Leaves (0.5–)1–2.5(–3) cm; leaflets (5 or)7–15(or 17), blades suborbiculate to oblong-ovate, 1–4(–5) mm, surfaces pubescent abaxially, with glands of similar size, glabrous adaxially.
Racemes

1–3.5 cm.
Flowers

calyx tube 2–3 mm, lobes acute to acuminate, 0.5–0.9 mm;

corolla white, turning purple, 4–6(–7.5) mm;

style eglandular.
Legumes

ascending, straight, ovoid-ellipsoid, 4.5–6 × 2.5–3 mm, length less than or equal to 2 times width, not flattened.
Seeds

completely filling legume, slightly compressed, obovoid, edges blunt.
2n

= 20.

Eysenhardtia orthocarpa

Eysenhardtia spinosa
Phenology Flowering Jul–Oct.
Habitat Dry, semi-desert grassland and shrubland.
Elevation 1200–1700[–2000] m. (3900–5600[–6600] ft.)
Distribution
from USDA
sw United States; n Mexico
[WildflowerSearch map]
[BONAP county map]
from FNA
TX; Mexico (Chihuahua, Durango)
[BONAP county map]
Discussion

Varieties 2 (1 in the flora).

In the United States, only the widespread, typical variety of Eysenhardtia orthocarpa is native; var. tenuifolia Lang is found only in Mexico (J. M. Lang and D. Isely 1982; R. McVaugh 1987; F. Shreve and I. L. Wiggins 1964 [treated as E. reticulata Pennell]).

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

Eysenhardtia spinosa can appear spiny due to the persistent, dead inflorescence rachises that are short and erect. By far the rarest species of the genus in the flora area, it has been collected in Presidio County.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11. FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Eysenhardtia Fabaceae > subfam. Faboideae > Eysenhardtia
Sibling taxa
E. spinosa, E. texana
E. orthocarpa, E. texana
Subordinate taxa
E. orthocarpa var. orthocarpa
Name authority (A. Gray) S. Watson: Proc. Amer. Acad. Arts 17: 339. (1882) Engelmann: Boston J. Nat. Hist. 6: 174. (1850)
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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