Malvella sagittifolia

(A. Gray) Fryxell

SouthW. Naturalist 19: 102. 1974.

Illustrated
Basionym: Sida lepidota var. sagittifolia A. Gray Smithsonian Contr. Knowl. 3(5): 18. 1852 (as sagittaefolia)
Synonyms: Disella sagittifolia (A. Gray) Greene S. sagittifolia (A. Gray) Rydberg
Treatment appears in FNA Volume 6. Treatment on page 302. Mentioned on page 301.

Stems prostrate, trailing, invested with silvery-white, lepidote scales. Leaves: petiole to 1/3 as long as blade; blade narrowly triangular, 1.5–3.5 cm, usually 3–5 (–6) times as long as wide, base truncate, margins entire with 2–4 hastate teeth at base, apex acute, surfaces with sparse, silvery-lepidote scales. Pedicels long, usually shorter than subtending leaves, involucellar bractlets 0. Flowers: calyx 7–9 mm, silvery-lepidote, lobes cordate-ovate, bases plicate-overlapping, apex acuminate; petals whitish or pale-yellow, sometimes fading rose, asymmetric, 15 mm; stamens pallid, glabrous, staminal column antheriferous at apex; style 7-branched or 8-branched, pallid, glabrous. Schizocarps 5–6 mm diam.


Phenology: Flowering year-round in warmer areas.
Habitat: Heavy, saline soil, mud flats, along lake shores
Elevation: 30–1500 m

Distribution

V6 548-distribution-map.jpg

Ariz., Colo., N.Mex., Tex., Mexico (Chihuahua), Mexico (Coahuila), Mexico (Durango), Mexico (San Luis Potosí), Mexico (Sonora), Mexico (Tamaulipas)

Discussion

Malvella sagittifolia is known from Otero County, Colorado; Dona Ana County, New Mexico; in scattered locations in Texas but primarily in the Big Bend region; and in much of central and southern Arizona. The comparatively long leaves with hastate teeth, the lack of any stellate hairs, and the consistent lack of an involucel distinguishes this species.

Selected References

None.

Lower Taxa

None.
... more about "Malvella sagittifolia"
acuminate;acute +
Paul A. Fryxell† +  and Steven R. Hill +
(A. Gray) Fryxell +
plicate-overlapping +
Sida lepidota var. sagittifolia +
triangular +
1.5 cm15 mm <br />0.015 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
caducous +  and persistent +
silvery-lepidote +
not inflated +
not accrescent +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
indehiscent +  and loculicidal +
rose +, fading pale +, pale-yellow +  and whitish +
Ariz. +, Colo. +, N.Mex. +, Tex. +, Mexico (Chihuahua) +, Mexico (Coahuila) +, Mexico (Durango) +, Mexico (San Luis Potosí) +, Mexico (Sonora) +  and Mexico (Tamaulipas) +
30–1500 m +
sparse;copious +
pistillate +  and staminate +
unisexual +  and bisexual +
oblate +  and not inflated +
Heavy, saline soil, mud flats, along lake shores +
axillary +  and terminal +
tough-fibrous +
connate +  and distinct +
simple +, stipulate +, sessile +, subsessile +  and petiolate +
distichous +  and alternate +
cordate-ovate +
3-40-carpellate +
(1-)2-many +
fading rose;pale-yellow;whitish +
adnate +  and distinct +
15 cm150 mm <br />0.15 m <br /> (?) +
0 +  and 1/3 +
Flowering year-round in warmer areas. +
SouthW. Naturalist +
silvery-white +
silvery-lepidote +  and lepidote +
5mm +  and 6mm +
reniform +
persistent +
Illustrated +
sessile +  and subsessile +
not viscid +
filiform +, linear +  and capitate +
1-2 times number of carpels +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
8-branched +  and 7-branched +
Disella sagittifolia +  and S. sagittifolia +
Malvella sagittifolia +
Malvella +
species +
2 (?) +  and 4 (?) +
hastate +
monoecious +, dioecious +  and hermaphroditic +