Ribes thacherianum

Plants 1–2.5 m. Stems erect, densely white soft-pubescent; spines at nodes absent or 1–3, 4–8 mm; prickles on internodes scattered, glandular and eglandular. Leaves: petiole 1–2 cm, copiously white-pilose; blade oblong to roundish, shallowly 5-lobed, cleft 1/4–1/3 to midrib, 2–3 cm, base truncate, surfaces soft-pubescent abaxially, subglabrous adaxially, lobes rounded, margins coarsely crenate-dentate, apex rounded to acute. Inflorescences pendent, solitary flowers or 2-flowered racemes, 2–4 cm, axis white-pilose. Pedicels not jointed, 6–8 mm, pilose; bracts broadly lanceolate, 2–3 mm, white-pilose. Flowers: hypanthium pinkish, narrowly tubular, 4–5 mm (1/2 as long as sepals), white-pilose, not glandular; sepals not overlapping, erect, pinkish, lanceolate, 9–10 mm; petals connivent, erect, white, oblong, inrolled, 4–6 mm; nectary disc not prominent; stamens 1.3 times as long as petals; filaments linear, 4–6 mm, glabrous; anthers white, lanceolate, somewhat sagittate, 3 mm, apex apiculate; ovary pilose, not glandular; styles connate nearly 3/4 their lengths, 9–11 mm, glabrous. Berries palatability not known, purple, subglobose, 7 mm, pilose-hairy with nonglandular spines.

Phenology: Flowering Nov–Jul.
Habitat: Ravines in pine forests
Elevation: 0-700 m

Distribution

• Generated Map
• Legacy Map

Calif.

Discussion

Ribes thacherianum is known only from Santa Cruz Island, Santa Barbara County. The indehiscent part of the anther is short and dark.

Selected References

None.

Lower Taxa

None.