Abronia nana

S. Watson

Proc. Amer. Acad. Arts. 14: 294. 1879. 1879

Endemic
Treatment appears in FNA Volume 4. Treatment on page 69. Mentioned on page 61.

Plants perennial, acaulescent or nearly so, usually cespitose. Leaves: petiole 1–5 cm; blade elliptic to lanceolate, shortly ovate, or oblong-ovate, (0.4–) 0.5–2.5 × (0.2–) 0.4–1.2 cm, less than 3 times as long as wide, margins entire or ± repand and undulate, surfaces glabrous or glandular-pubescent. Inflorescences: bracts lanceolate to ovate, 4–9 × 2–7 mm, scarious, glandular-puberulent, often minutely so; flowers 15–25. Perianth: tube pale-pink, 8–30 mm, limb white to pink, 6–10 mm diam. Fruits obovate to obcordate in profile, 6–10 × 5–7 mm, scarious, apex low and broadly conic; wings 5, without dilations, without cavities.

Distribution

Ariz., Calif., Colo., Nev., Utah

Discussion

Varieties 2 (2 in the flora).

Abronia nana is a highly variable species. Perhaps contraction of the range of A. nana during the Pleistocene left isolated populations that have since diverged. This is especially apparent on the southern edge of the range of the species. In northeastern Arizona, densely tufted plants with very small blades are similar to short-leaved plants of A. bigelovii from north-central New Mexico.

Based on the fruits, the taxon described as Abronia nana var. harrisii S. L. Welsh is A. elliptica.

Selected References

None.

Key

1 Leaf blades elliptic-lanceolate to elliptic-ovate; inflorescence bracts ovate to oblong-lanceolate, or vestigial Abronia nana var. nana
1 Leaf blades shortly ovate to oblong-ovate; inflorescence bracts lanceolate Abronia nana var. covillei
... more about "Abronia nana"
Leo A. Galloway +
S. Watson +
glutinous +
unequal +
woody +, leathery +  and fleshy +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
elliptic;lanceolate shortly ovate or oblong-ovate +
succulent +
0.4cm;1.2cm +
persistent +
distinct +
0.4 cm4 mm <br />0.004 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
glandular-puberulent +
lanceolate +  and ovate +
not accrescent +
0.2 cm2 mm <br />0.002 m <br /> (?) +  and 0.7 cm7 mm <br />0.007 m <br /> (?) +
corollalike +  and petaloid +
flattened +  and dilated +
Ariz. +, Calif. +, Colo. +, Nev. +  and Utah +
curved +  and straight +
inconspicuous +  and showy +
15 +  and 25 +
chasmogamous +  and bisexual +
not +  and winged +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
glabrate +  and viscid puberulent +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
cauline +  and basal +
unequal +
white +  and pink +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
5-lobed +
pubescent +  and glabrous +
undulate +, repand +  and entire +
expanded +
salverform +
constricted +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Proc. Amer. Acad. Arts. +
slightly rounded;conic +
thick +  and thin +
fibrous;fleshy +
membranaceous +
ribbed +, 10-ribbed +  and 5-ribbed +
pubescent +, glabrous +  and warty +
prostrate +  and erect +
fusiform +  and linear +
filiform +
rugose +  and smooth +
glandular-pubescent +  and glabrous +
Tricratus +
slender +  and stout +
Abronia nana +
species +
gland-tipped +
0.8 cm8 mm <br />0.008 m <br /> (3 cm30 mm <br />0.03 m <br />) +
nearly +  and acaulescent +
plant +  and cespitose +