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mountain mock thelypody

Stems

simple or several from base, 2–12.3 dm, pubescent proximally, trichomes predominantly dendritic, mixed with simple and long-stalked, 2-rayed ones, glabrous or sparsely pubescent distally, trichomes dendritic.

Basal leaves

caducous;

petiole 0.5–4 cm;

blade oblanceolate, (1–)3–5 cm × 6–34 mm, margins sinuate, lobed, dentate, or, rarely, subentire, surfaces pubescent, trichomes dendritic.

Cauline leaves

(distal) subsessile;

blade oblanceolate, 3–10 cm × 1–20 mm, surfaces glabrous or glabrate.

Racemes

not secund, 1.5–6.7 dm in fruit.

Flowers

sepals purple or green, broadly oblong, 2.7–4 × 1.2–2 mm;

petals purplish apically, spatulate to oblanceolate, 1.5–4(–5) × 0.5–2.2 mm;

filaments 0.9–2.6mm;

anthers 1–1.2 mm.

Fruiting pedicels

slightly erect to divaricate-ascending, straight, (3–)3.5–8.5(–11) mm.

Fruits

erect to ascending, straight, (1.5–)2.2–5.8 cm × 0.6–1.8 mm, terete;

valves glabrous or sparsely pubescent;

septum transparent;

ovules 90–140 per ovary;

style obsolete to 0.5 mm.

Seeds

biseriate or uniseriate, plump, not winged, oblong, 0.7–0.8 × 0.4–0.5 mm;

seed coat mucilaginous when wetted;

cotyledons incumbent.

Pennellia micrantha

Phenology Flowering Jun–Sep.
Habitat Pine-oak forests, open grasslands, rolling andesitic loam soils, among volcanic rocks, igneous cliffs
Elevation 1100-3600 m (3600-11800 ft)
Distribution
from FNA
AZ; NM; TX; Mexico (Chihuahua, Coahuila, Distrito Federal, Durango, state of México, Michoacán, Querétaro, San Luis Potosí, Sonora)
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 7, p. 560.
Parent taxa Brassicaceae > tribe Halimolobeae > Pennellia
Sibling taxa
P. longifolia, P. tricornuta
Synonyms Streptanthus micranthus, Heterothrix micrantha, P. robinsonii, Thelypodium longifolium var. catalinense, Thelypodium micranthum
Name authority (A. Gray) Nieuwland: Amer. Midl. Naturalist 5: 224. (1918)
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