Triphysaria floribunda

(Bentham) T. I. Chuang & Heckard

Syst. Bot. 16: 660. 1991.

Common names: San Francisco owl's-clover
EndemicConservation concern
Basionym: Orthocarpus floribundus Bentham Scroph. Ind., 12. 1835
Treatment appears in FNA Volume 17. Treatment on page 686. Mentioned on page 685.

Stems simple or with 1–15 ascending branches proximally, 6–24(–30) cm, glabrous proximally, sparsely retrorsely short-strigose distally. Leaves glabrous or sparsely puberulent; proximal cauline: blade linear to linear-lanceolate, 6–14 mm; cauline: blade ± ovate, 10–56 mm, base sessile, margins pinnatifid, rarely bipinnatifid, lateral lobes 4–8. Spikelike racemes interrupted, dense distally, 1–5.5 cm; peduncle absent; bracts pinnatifid, ± ovate, 4–12 mm, lateral lobes 2–6. Pedicels 0–0.3 mm, glabrous. Flowers: calyx 4–6 mm, glabrous, tube 2–4 mm, lobes triangular to narrowly lanceolate, 1.3–2 × 0.8–1 mm; corolla creamy white, rarely pale yellow, 6–14 mm, glabrous, beak light green or white, not hooked, abaxial lobes spreading, 1.5–3 mm, throat abruptly indented, forming a fold under abaxial corolla lip, adaxial lobes projecting; stamens exserted, pollen sac yellow, 1.3–1.5 mm, glabrous, dehiscing longitudinally; style 5.5–6 mm, glabrous; stigma capitate. Capsules 4.5–6.5 × 3–3.5 mm, glabrous. Seeds 20–35, ovoid, 0.6–1.3 mm. 2n = 22.


Phenology: Flowering Apr–Jun.
Habitat: Coastal or valley grasslands, grassy and rocky hills, sandy soils, road edges, coastal scrub, serpentine slopes.
Elevation: 0–200 m.

Discussion

Triphysaria floribunda is known from the San Francisco Bay area. The species is threatened by grazing, non-native plants, and trampling (California Native Plant Society, http://www.rareplants.cnps.org); only 14 of the 150 specimens for T. floribunda in the California Consortium of Herbaria portal (http://ucjeps.berkeley.edu/consortium) were collected after 1971.

Selected References

None.

Lower Taxa

None.
... more about "Triphysaria floribunda"
Elizabeth H. Zacharias +
(Bentham) T. I. Chuang & Heckard +
Orthocarpus floribundus +
San Francisco owl's-clover +
0–200 m. +
Coastal or valley grasslands, grassy and rocky hills, sandy soils, road edges, coastal scrub, serpentine slopes. +
Flowering Apr–Jun. +
Endemic +  and Conservation concern +
Orthocarpus subg. Triphysaria +
Triphysaria floribunda +
Triphysaria +
species +