Ribes thacherianum

(Jepson) Munz

Aliso 4: 92. 1958 ,.

Common names: Santa Cruz Island gooseberry
Endemic
Basionym: Ribes menziesii var. thacherianum Jepson Fl. Calif. 2: 156. 1936
Treatment appears in FNA Volume 8. Treatment on page 31. Mentioned on page 12, 29.

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

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.
... more about "Ribes thacherianum"
sagittate +  and lanceolate +
3 cm30 mm <br />0.03 m <br /> (?) +
rounded +  and acute +
Nancy R. Morin +
(Jepson) Munz +
white-pilose +
Ribes menziesii var. thacherianum +
pilose-hairy +
subglobose +
7 cm70 mm <br />0.07 m <br /> (?) +
1/4 +  and 1/3 +
5-lobed;oblong;roundish +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
persistent +
white-pilose +
lanceolate +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Santa Cruz Island gooseberry +
0-700 m +
not starchy +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Ravines in pine forests +
free +  and adnate +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
axillary +  and terminal +
triangular +  and pentangular +
rounded +
greenish +, yellow +, purple +  and dark red +
crassinucellate +  and bitegmic +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
distinct +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
white-pilose +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Flowering Nov–Jul. +
tubular +, campanulate +, cup-shaped +  and saucer--shaped +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
brown;black +
fusiform;oblong-ellipsoid or ellipsoid +
not overlapping +
lanceolate +
0.9 cm9 mm <br />0.009 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
distinct +, adnate +  and free +
1.3 times as long as petals +
antisepalous +
soft-pubescent +
differentiated +
0.9 cm9 mm <br />0.009 m <br /> (?) +  and 1.1 cm11 mm <br />0.011 m <br /> (?) +
subglabrous +  and soft-pubescent +
Grossularia +
Ribes thacherianum +
species +