Streptanthus carinatus |
Streptanthus gracilis |
|||||
---|---|---|---|---|---|---|
lyreleaf jewelflower |
alpine jewel flower |
|||||
Habit | Annuals or biennials; (glaucous), glabrous throughout. | Annuals; (slender); (glaucous), glabrous throughout. | ||||
Stems | branched basally and/or distally, (2.1–)3–6.5(–7.5) dm. |
often branched basally, (0.6–)1–3.5 dm. |
||||
Basal leaves | rosulate; petiolate; blade pinnatifid or oblanceolate, 3.5–15(–30) cm, margins runcinate-pinnatifid, dentate, or entire. |
rosulate; petiolate; blade oblanceolate to spatulate, 1–7 cm, margins usually sinuate to dentate, rarely lobed. |
||||
Cauline leaves | blade ovate to lanceolate, 2.5–14 cm × 4–55 mm, (smaller distally), base auriculate to amplexicaul, margins runcinate-pinnatifid, dentate, or entire (usually entire distally). |
(shortly petiolate or sessile); blade oblong to ovate, 0.5–3 cm × 1–5 mm, (smaller distally), base auriculate or (distally) amplexicaul, margins entire or dentate apically, (entire distally). |
||||
Racemes | ebracteate, (lax). |
bracteate below or between proximalmost 1 or 2 flowers. |
||||
Flowers | calyx urceolate or campanulate; sepals purple, or ochroleucous to yellowish, 8–11 mm, keeled; petals white (with purplish veins) or purple (with white margins, recurved), 14–18 mm, blade 5–8 × 1–1.5 mm, margins crisped, claw 9–12 mm, about as wide as blade; stamens in 3 unequal pairs; filaments (distinct): abaxial pair 6–10 mm, lateral pair 4–7 mm, adaxial pair (exserted), 9–12 mm; anthers (all) fertile, 4–5 mm; gynophore 0.5–2 mm. |
calyx slightly urceolate; sepals rose-purple, 4–5 mm, not keeled; petals (spreading), pinkish, 7–10 mm, blade 3–5 × 1.5–2.5 mm, margins not crisped, claw 5–6 mm, narrower than blade; stamens in 3 unequal pairs; filaments (distinct): abaxial pair 3–4 mm, lateral pair 1.5–2.5 mm, adaxial pair 5–6 mm; anthers (all) fertile, 1.5–2 mm; gynophore 0.5–3 mm. |
||||
Fruiting pedicels | divaricate-ascending, (straight or curved upward), 7–22(–35) mm. |
divaricate to ascending, (straight or recurved), 3–6 mm, (not expanded at receptacle). |
||||
Fruits | ascending, smooth, straight, strongly flattened, 3–8 cm × 4.5–6 mm; valves each with obscure midvein; replum straight; ovules 26–54 per ovary; style 0.5–2 mm; stigma strongly 2-lobed. |
ascending, torulose, straight, slightly flattened, 3–7 cm × 1–1.5 mm; valves each with obscure midvein; replum straight; ovules 24–52 per ovary; style 0.1–0.5 mm; stigma entire. |
||||
Seeds | orbicular, 3–5 mm diam.; wing 0.6–1.1 mm wide, continuous. |
oblong, 1–1.5 × 0.6–0.9mm; wing (0–)0.05–0.25 mm, distal. |
||||
2n | = 28. |
|||||
Streptanthus carinatus |
Streptanthus gracilis |
|||||
Phenology | Flowering Jun–Sep. | |||||
Habitat | Rocky open subalpine or alpine vegetation, pockets of weathered granite sand and gruss | |||||
Elevation | 2600-3600 m (8500-11800 ft) | |||||
Distribution |
AZ; NM; TX; n Mexico
|
CA |
||||
Discussion | Subspecies 2 (2 in the flora). A. R. Kruckeberg et al. (1982) presented evidence for hybridization between subsp. carinatus and subsp. arizonicus, and showed that the lighter flower color in the latter correlates with degree of leaf division. Within the range of Streptanthus carinatus, four color forms are known: purple, white, ochroleucous, and yellow. Variability in petal color does not correlate with geography or habitat, and flowers are often poorly preserved on herbarium specimens, making it unclear whether the color forms are allopatric. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Streptanthus gracilis is known from the Kings-Kern Divide in the southern Sierra Nevada of Fresno, Inyo, and Tulare counties. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
||||
Key |
|
|||||
Source | FNA vol. 7, p. 708. | FNA vol. 7, p. 715. | ||||
Parent taxa | Brassicaceae > tribe Thelypodieae > Streptanthus | Brassicaceae > tribe Thelypodieae > Streptanthus | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Disaccanthus carinatus | Pleiocardia gracilis | ||||
Name authority | C. Wright ex A. Gray: Smithsonian Contr. Knowl. 5(6): 11. (1853) | Eastwood: Proc. Calif. Acad. Sci., ser. 3, 2: 285. (1902) | ||||
Web links |