Boykinia intermedia

(Piper) G. N. Jones

Bot. Surv. Olympic Penins., 168. 1936,.

Basionym: Boykinia major var. intermedia Piper Erythea 7: 172. 1899
Synonyms: Therofon intermedium (Piper) A. Heller Therofon major subsp. intermedium (Piper) Piper
Treatment appears in FNA Volume 8. Treatment on page 127. Mentioned on page 125, 126.
Revision as of 00:09, 28 May 2020 by imported>Volume Importer

Plants stoloniferous; rhizomes proliferating above ground. Flowering stems 25–70 cm. Basal leaves: petiole 3–15 cm; blade reniform, 3–7-lobed to 1/2–3/4 its length, (3–)5–11 × (5–)8–14 cm, margins 2–3-times dentate. Cauline leaves: stipules (2–)4–9 mm, usually foliaceous, smaller ones fringed with brown hairs. Inflorescences ± pyramidal, (5–)9–13-flowered per primary branch. Pedicels densely stipitate-glandular. Flowers: hypanthium campanulate to turbinate, free portion 0.8–1.3 mm, densely stipitate-glandular; sepals erect, lanceolate, (1.5–)2–3 mm, apex acute; petals spatulate to ovate, 3–7 × 1–3 mm, base tapered to claw, margins plane; nectary greenish yellow; stamens 1.3–1.8 mm; ovary subinferior. Capsules ovoid, turbinate, or urceolate. Seeds usually black, tuberculate. 2n = 28.


Phenology: Flowering summer.
Habitat: Temperate rainforest, margins of lakes, ponds, and watercourses
Elevation: 10-700 m

Discussion

Of conservation concern.

Specimens considered to represent Boykinia intermedia from northern Idaho (R. Bacigalupi 1952; F. D. Johnson and R. Steele 1978) were regarded as B. major by R. J. Gornall and B. A. Bohm (1985); they require further study. Boykinia intermedia differs from that species in its stoloniferous habit, smaller stipules, a campanulate rather than saucer-shaped hypanthium, a shorter free-hypanthium, petals tapered rather than contracted abruptly to a claw and with plane rather than undulate margins, a more pyramidal inflorescence, and an absence of polymethylated flavonols.

Selected References

None.

Lower Taxa

None.
... more about "Boykinia intermedia"
Richard J. Gornall +
(Piper) G. N. Jones +
Boykinia major var. intermedia +
Oreg. +  and Wash. +
10-700 m +
Temperate rainforest, margins of lakes, ponds, and watercourses +
Flowering summer. +
Bot. Surv. Olympic Penins., +
Therofon intermedium +  and Therofon major subsp. intermedium +
Boykinia intermedia +
Boykinia +
species +