Physaria argyraea subsp. argyraea

Treatment appears in FNA Volume 7. Treatment on page 627.

Perennials; caudex simple or branched, (woody); ± densely pubescent, trichomes (sessile or short-stalked), few to several-rayed, rays fused at base, (smooth or finely tuberculate). Stems simple or several from base, prostrate and spreading to decumbent or erect, 0.5–4 (–7) dm. Basal leaves (usually shed early); blade oblanceolate, 2–6 (–8) cm, margins entire or pinnatifid. Cauline leaves (densely overlapping, often appressed, erect; petiolate); blade elliptic or obovate to rhombic, 0.5–4.5 cm, margins entire or sinuate or remotely dentate, (apex usually acute). Racemes loose. Fruiting pedicels (spreading to erect or occasionally slightly recurved, sigmoid, straight, or slightly curved), 15–40 mm. Flowers: sepals linear to oblong or elliptic, (3–) 4–8 mm, (median pair thickened apically, cucullate); petals (orange or yellow, rarely fading purplish, claw often orange), spatulate or obovate to obdeltate, (narrowing to relatively short claw), 4.5–8.5 (–11) mm. Fruits subglobose to broadly ellipsoid, slightly compressed (or terete), 4–8 mm; valves (not retaining seeds after dehiscence), glabrous throughout; replum as wide as or wider than fruit; ovules 16–32 per ovary; style 1.5–5.5 mm. Seeds flattened, (sometimes narrowly margined).


Phenology: Flowering Feb–May(-Jun).
Habitat: Sandy granite- or, usually, limestone-derived soils
Elevation: 0-800 m

Distribution

V7 1021-distribution-map.gif

Tex., n Mexico (Coahuila), n Mexico (Nuevo León)

Discussion

Subspecies argyraea differs from subsp. diffusa (Rollins) O’Kane & Al-Shehbaz of the Sierra Madre Oriental of Mexico in being herbaceous (rather than at least somewhat woody throughout) and having decumbent to erect (rather than prostrate) stems.

Selected References

None.

Lower Taxa

None.

"not" is not a number. "elongated" is not a number."thick" is not a number."dm" is not declared as a valid unit of measurement for this property."dm" is not declared as a valid unit of measurement for this property.

ovate +  and narrowly oblong +
Steve L. O’Kane Jr. +
(A. Gray) O’Kane & Al-Shehbaz +
Vesicaria argyraea +
appendaged +  and unappendaged +
6 cm60 mm <br />0.06 m <br /> (8 cm80 mm <br />0.08 m <br />) +
repand +  and dentate +
obovate;rhombic +
much smaller +  and reduced +
0.5 cm5 mm <br />0.005 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
urceolate +, campanulate +  and tubular +
branched +  and simple +
sessile +  and petiolate +
well-developed +
distinct +
not +  and differentiated +
emarginate +  and entire +
Tex. +, n Mexico (Coahuila) +  and n Mexico (Nuevo León) +
0-800 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
actinomorphic +
0.85 cm8.5 mm <br />0.0085 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
obovate +  and obdeltate +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.85 cm8.5 mm <br />0.0085 m <br />) +
2-valved +  and capsular +
compressed +, subglobose +  and broadly ellipsoid +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
latiseptate +, stipitate +, , +, subsessile +  and sessile +
angustiseptate +, terete +, not +, inflated +, not torulose +, obovoid +, ovoid +, ovate +, obpyriform +, oblong +, obdeltate +, obcordate +, lanceolate +, elliptic +, ellipsoid +, suborbicular +, orbicular +, subglobose +  and globose +
latiseptate +  and unsegmented +
angustiseptate +  and terete +
Sandy granite- or, usually, limestone-derived soils +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
dentate;sinuate;entire;pinnatifid;entire +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
purple +, white +, orange +  and yellow +
rudimentary +
obdeltate +, oblanceolate +, ovate +, obovate +  and spatulate +
Flowering Feb–May(-Jun). +
trinucleate +  and 3(-11)-colpate +
ascending +, spreading +, horizontal +  and erect +
slender +
1.5 cm15 mm <br />0.015 m <br /> (4 cm40 mm <br />0.04 m <br />) +
rounded +  and narrowly oblong +
not +  and mucilaginous +
margined +  and winged +
not +  and mucilaginous +
white +, black +, brown +  and yellow +
flattened +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
persistent +  and caducous +
distinct +
spreading +  and erect +
linear +  and oblong or elliptic +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
perforate +  and complete +
reduced +
latiseptate +, schizocarpic +, samaroid +  and lomentaceous +
indehiscent +  and dehiscent +
angustiseptate +, flat +, angled +, terete +, torulose +, not +, segmented +  and nutletlike +
tetradynamous +
procumbent +  and decumbent +
spreading +  and decumbent or erect +
2-lobed +  and entire +
subsessile +, sessile +  and petiolate +
persistent +
distinct +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
Alyssum argyraeum +  and Lesquerella argyraea +
Physaria argyraea subsp. argyraea +
Physaria argyraea +
subspecies +
stellate-scalelike +
coiled +, 1-7-veined +  and veined +
anastomosing +
perennial +, biennial +  and annual +
aquatics +  and terrestrial +
glabrous +  and pubescent +
15 +, 12 +, 10 +, 9 +, 8 +, 7 +, 6 +, 5 +  and 4 +