Flora of North America species comparison

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Boykinia richardsonii

Alaska boykinia, bear flower, Richardson's brookfoam
Habit Plants: rhizomes proliferating underground.
Flowering stems

10–40(–60) cm.
Basal leaves

petiole 2.5–10(–22.5) cm;

blade usually reniform, shallowly lobed, rarely to 1/2 its length, 2–7(–12) × (3–)5–11(–15) cm, margins 2–3-times dentate.
Cauline leaves

stipules (1–)2–5 mm, either expansions of petiole base and fringed with brown hairs, or foliaceous.
Inflorescences

narrowly cylindric, 3-flowered per primary branch.
Pedicels

densely stipitate-glandular.
Flowers

hypanthium campanulate, free portion (1–)2–3 mm, densely stipitate-glandular;

sepals erect, triangular to lanceolate, 3–7 mm, apex acute;

petals sometimes with pink veins, ovate to elliptic, 8–12(–15) × 3–7 mm, 2–3(–5) times as long as sepals, base short-clawed, margins plane;

nectary deep purple, sometimes greenish;

stamens 3.3–5.2 mm;

ovary subinferior.
Capsules

ovoid, turbinate, or urceolate.
Seeds

brown, smooth.
2n

= 36, 84.

Boykinia richardsonii
Phenology Flowering summer.
Habitat Stream-side gullies, snow-bed grassland and meadows, in open or in partial shade of Salix thickets
Elevation 0-1700 m (0-5600 ft)
Distribution
from FNA
AK; YT
[BONAP county map]
Discussion

Boykinia richardsonii was originally misidentified as Saxifraga nelsoniana D. Don by W. J. Hooker and G. A. W. Arnott ([1830–]1841); the error was soon rectified. Reports of B. richardsonii from eastern Siberia (P. A. Rydberg 1905; H. G. A. Engler 1930) appear to be erroneous.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 8, p. 128.
Parent taxa Saxifragaceae > Boykinia
Sibling taxa
B. aconitifolia, B. intermedia, B. major, B. occidentalis, B. rotundifolia
Synonyms Saxifraga richardsonii, Hemieva richardsonii, Therofon richardsonii
Name authority (Hooker) Rothrock: Rep. (Annual) Board Regents Smithsonian Inst. 1867: 447. 1868 ,
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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