Flora of North America species comparison

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Rhinotropis lindheimeri var. parvifolia
Photo is of parent taxon
Stems

usually pubescent, rarely glabrous, hairs usually closely incurved, occasionally loosely so, or rarely irregularly spreading, 0.07–0.15 mm.
Leaf

blades lanceolate, linear, scalelike to elliptic, ovate, or obovate, 3–41 × 0.5–10 mm, venation usually not prominently reticulate, except midvein abaxially, occasionally reticulate, surfaces with pubescence similar to stems or glabrous.
Keel

sacs glabrous or, rarely, with incurved hairs in distal 1/2.
2n

= 18.

Rhinotropis lindheimeri var. parvifolia
Phenology Flowering early spring–fall (year-round).
Habitat Rocky or clay soils of limestone or igneous origin, infrequently on gypseous substrates, occasionally in rock crevices of open slopes, ridge tops, canyons, savannas, desert grasslands, oak-pinyon woodlands, chaparral.
Elevation 300–2400 m. (1000–7900 ft.)
Distribution
from FNA
AZ; NM; OK; TX; Mexico (Chihuahua, Coahuila, Nuevo León, Zacatecas)
[BONAP county map]
Discussion

As discussed by T. L. Wendt (1978), var. parvifolia, the most widespread and variable variety, intergrades fairly extensively with the others, especially in the southern and western portions of its range, where it is relatively common to find morphological intermediates. Despite var. parvifolia having been treated as a distinct species by other workers, for example, S. F. Blake (1916, 1924), Wendt made a compelling case correlating morphology with geography, ecology, and karyology, for nomenclatural recognition at varietal rank.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 10.
Parent taxa Polygalaceae > Rhinotropis > Rhinotropis lindheimeri
Sibling taxa
R. lindheimeri var. lindheimeri
Synonyms Polygalalindheimeri a. var. parvifolia, P. tweedyi
Name authority (Wheelock) J. R. Abbott: J. Bot. Res. Inst. Texas 5: 135. (2011)
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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