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Geyer's bladderpod, Geyer's twin-pod

Fremont County twinpod, Rocky Mountain or Fremont County twinpod

Habit Perennials; caudex usually simple, (cespitose); (silvery) pubescent throughout, trichomes (sessile), 6–8-rayed, rays mostly furcate, (tuberculate to nearly smooth). Perennials; caudex usually simple; (silvery) pubescent throughout, trichome rays furcate.
Stems

several from base, decumbent, (arising laterally, unbranched), 1–3 dm.

several from base, prostrate to decumbent, 0.3–1 dm.

Basal leaves

(numerous); (petiole slender, rarely with a few broad teeth);

blade obovate, 3–7 cm, margins entire.

(rosulate; petiole winged);

blade orbicular to broadly obovate, 1.5–3 cm, margins entire or with broad, obscure toothlike angles each side at apex, (apex obtuse, surfaces densely pubescent, trichomes appressed).

Cauline leaves

blade oblanceolate, 1.5–3 cm, margins entire.

blade broadly spatulate to linear-oblanceolate, 1–1.5 cm, margins entire.

Racemes

loose.

condensed, (subumbellate to slightly more elongated, few-flowered).

Flowers

sepals oblong, 5–7 mm;

petals (yellow to purplish), spatulate, 8–12 mm.

sepals (yellowish, often with some purple), narrowly lanceolate, 5–6 mm;

petals spatulate, 7.3–9.2 mm, (not clawed).

Fruiting pedicels

(ascending or spreading, slightly curved or sigmoid), 1–2 cm.

(divaricate-ascending, straight to slightly curved), 6–10 mm.

Fruits

obcordate, angustiseptate, somewhat inflated, (not bladdery), 5–7 × 6–9 mm, (papery, basal sinus absent, apical sinus broad and open);

valves (retaining seeds after dehiscence), loosely pubescent, trichomes spreading;

replum ovate, 5–7 mm, as wide as or wider than fruit, apex acute or obtuse;

ovules 4–6 per ovary;

style 5–7 mm.

didymous, irregular, suborbicular, deeply bilobed, inflated in age, 10–12 × 12–15 mm, (papery, basal sinus absent or obsolete, apical sinus deep);

valves (retaining seeds after dehiscence), densely pubescent, trichomes spreading, (ovaries and immature fruit downy);

replum narrowly ovate to broadly oblong, not narrowed at middle, as wide as or wider than fruit, apex acute to obtuse;

ovules 4 per ovary;

style 3–7 mm.

Seeds

flattened.

Physaria geyeri

Physaria saximontana

Distribution
from FNA
ID; MT; OR; WA
[WildflowerSearch map]
[BONAP county map]
from FNA
MT; WY
[BONAP county map]
Discussion

Subspecies 2 (2 in the flora).

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

Subspecies 2 (2 in the flora).

Physaria saximontana (especially subsp. dentata) is morphologically similar to 22. P. didymocarpa.

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

Key
1. Replum apices acute; ovules 4 per ovary; petals yellow, drying yellow.
subsp. geyeri
1. Replum apices obtuse; ovules usually 6 per ovary; petals purplish or light yellow, drying purplish.
subsp. purpurea
1. Basal leaf blades: margins entire, apices rounded to angled; styles 3-5 mm.
subsp. saximontana
1. Basal leaf blades: margins dentate (teeth broad), apices angled; styles 4-7 mm.
subsp. dentata
Source FNA vol. 7, p. 638. FNA vol. 7, p. 661.
Parent taxa Brassicaceae > tribe Physarieae > Physaria Brassicaceae > tribe Physarieae > Physaria
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. 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. ovalifolia, 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. 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. ovalifolia, 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. scrotiformis, P. sessilis, P. spatulata, P. subumbellata, P. tenella, P. thamnophila, P. tumulosa, P. valida, P. vicina, P. vitulifera
Subordinate taxa
P. geyeri subsp. geyeri, P. geyeri subsp. purpurea
P. saximontana subsp. dentata, P. saximontana subsp. saximontana
Synonyms Vesicaria geyeri, Coulterina geyeri, Lesquerella geyeri
Name authority (Hooker) A. Gray: Gen. Amer. Bor. 1: 162. (1848) Rollins: Contr. Gray Herb. 214: 13. (1984)
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