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roundleaf bladderpod

Photo is of parent taxon
Habit Perennials; caudex simple or branched, (thickened by persistent leaf bases); densely pubescent (foliage usually scabrous), trichomes (sessile or short-stalked), several-rayed, rays furcate near base, (usually strongly umbonate, roughly tuberculate, less so over umbo).
Caudex

usually simple.

Stems

few to several from base, erect or outer decumbent, 0.5–2.5 dm.

usually few from base, erect or outer decumbent, 1.5–2.5 dm.

Basal leaves

blade suborbicular to elliptic or ovate or deltate, 0.5–2(–6.5) cm, margins entire or shallowly dentate.

blade (outer) often broadly elliptic, base narrowing gradually to petiole, margins sinuate to dentate (or blade deltate, less than 1 cm, base abruptly narrowed to petiole).

Cauline leaves

(proximal shortly petiolate, distal usually sessile);

blade narrowly elliptic or obovate, (0.5–)1–2.5(–4) cm, margins entire.

Racemes

compact, (± subumbellate to densely corymbiform, elongated or not).

usually elongated.

Flowers

sepals ± elliptic, 4.5–7(–8.5) mm, (median pair thickened apically);

petals (sometimes white), suborbicular to obovate or obdeltate, 6.5–15 mm, (base narrowing to broad claw, apex sometimes emarginated).

Fruiting pedicels

(usually spreading at right angles, sometimes nearly erect, ± straight), 5–15(–20) mm, (stout).

Fruits

(sessile or shortly stipitate, less than 1 mm), subglobose to broadly ellipsoid, inflated or slightly compressed (terete or subterete), (4–)5–8(–9) mm;

valves (not retaining seeds after dehiscence), glabrous;

replum as wide as or wider than fruit;

ovules 8–16 per ovary;

style 4–8(–9) mm.

Seeds

flattened.

Petals

white, (9–)11–15 mm, often 2 times as long as sepals.

2n

= 12.

Physaria ovalifolia

Physaria ovalifolia subsp. alba

Phenology Flowering Mar–May, usually in Apr.
Habitat Limey and gravelly knolls, grassland hills, limestone hillsides and breaks, gypsum, shale, rocky calcareous soils, stony areas, prairie pastures, limestone roadcuts
Elevation 150-700 m (500-2300 ft)
Distribution
from FNA
CO; KS; NE; NM; OK; TX
[WildflowerSearch map]
[BONAP county map]
from FNA
KS; OK
[BONAP county map]
Discussion

Subspecies 2 (2 in the flora).

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

Key
1. Caudices branched (well-developed); petals usually yellow, rarely white, 6.5-12(-14) mm, usually 1.5 times or less as long as sepals; racemes usually not elongated (subumbellate).
subsp. ovalifolia
1. Caudices usually simple; petals white, (9-)11-15 mm, often 2 times as long as sepals; racemes usually elongated.
subsp. alba
Source FNA vol. 7, p. 655. FNA vol. 7, p. 656.
Parent taxa Brassicaceae > tribe Physarieae > Physaria Brassicaceae > tribe Physarieae > Physaria > Physaria ovalifolia
Sibling taxa
P. acutifolia, P. alpestris, P. alpina, P. angustifolia, P. arctica, P. arenosa, P. argyraea, P. arizonica, P. aurea, P. bellii, P. brassicoides, P. calcicola, P. calderi, P. carinata, P. chambersii, P. cinerea, P. condensata, P. congesta, P. cordiformis, P. curvipes, P. densiflora, P. didymocarpa, P. dornii, P. douglasii, P. eburniflora, P. engelmannii, P. eriocarpa, P. fendleri, P. filiformis, P. floribunda, P. fremontii, P. garrettii, P. geyeri, P. globosa, P. gooddingii, P. gordonii, P. gracilis, P. grahamii, P. hemiphysaria, P. hitchcockii, P. humilis, P. integrifolia, P. intermedia, P. kingii, P. klausii, P. lata, P. lepidota, P. lesicii, P. lindheimeri, P. ludoviciana, P. macrocarpa, P. mcvaughiana, P. montana, P. multiceps, P. navajoensis, P. nelsonii, P. newberryi, P. obcordata, P. obdeltata, P. occidentalis, P. oregona, P. pachyphylla, P. pallida, P. parviflora, P. parvula, P. pendula, P. pinetorum, P. prostrata, P. pruinosa, P. pulvinata, P. purpurea, P. pycnantha, P. rectipes, P. recurvata, P. reediana, P. rollinsii, P. saximontana, P. scrotiformis, P. sessilis, P. spatulata, P. subumbellata, P. tenella, P. thamnophila, P. tumulosa, P. valida, P. vicina, P. vitulifera
P. ovalifolia subsp. ovalifolia
Subordinate taxa
P. ovalifolia subsp. alba, P. ovalifolia subsp. ovalifolia
Synonyms Lesquerella ovalifolia, Lesquerella engelmannii subsp. ovalifolia Lesquerella ovalifolia var. alba, Lesquerella engelmannii subsp. alba, Lesquerella ovalifolia subsp. alba, P. ovalifolia var. alba
Name authority (Rydberg) O’Kane & Al-Shehbaz: Novon 12: 326. (2002) (Goodman) O’Kane & Al-Shehbaz: Novon 12: 326. (2002)
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