Flora of North America species comparison

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Boykinia rotundifolia

round leaf boykinia, roundleaf brookfoam, roundleafed brookfoam
Habit Plants: rhizomes proliferating underground.
Flowering stems

(30–)50–80(–130) cm.
Basal leaves

petiole 5–22 cm;

blade usually orbiculate-cordate, sometimes reniform, shallowly and indistinctly lobed, (3.5–)7–16 × (4–)9–18 cm, margins 2–3-times serrate.
Cauline leaves

stipules 1–2 mm expansions of petiole base, fringed with brown hairs.
Inflorescences

± pyramidal, (10–)15–25-flowered per primary branch.
Pedicels

densely stipitate-glandular.
Flowers

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

sepals erect, triangular to lanceolate, 1.5–2 mm, apex acute;

petals narrowly spatulate, 2–3 × 1 mm, shorter than or to 1.5 times as long as sepals, base tapered to claw, margins plane;

nectary green;

stamens 1.2–1.6 mm;

ovary 2/3 inferior.
Capsules

ovoid, turbinate, or urceolate.
Seeds

usually black, tuberculate.
2n

= 14.

Boykinia rotundifolia
Phenology Flowering early-mid summer.
Habitat Damp woodlands, margins of lakes, ponds, and watercourses, often on disturbed soil, trailsides, mudslides
Elevation 800-2000 m (2600-6600 ft)
Distribution
from FNA
CA; Mexico (Baja California)
[WildflowerSearch map]
[BONAP county map]
Discussion

The record of Boykinia rotundifolia from “Lower California” (Williamson, 20 July 1901, PH) is the only collection seen from Mexico. The species is occasionally grown in gardens.

(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. richardsonii
Synonyms Therofon rotundifolium
Name authority Parry ex A. Gray: Proc. Amer. Acad. Arts 13: 371. (1878)
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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