Flora of North America species comparison

The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

Boykinia aconitifolia

Allegheny brookfoam, brook saxifrage
Habit Plants: rhizomes proliferating underground.
Flowering stems

15–80 cm.
Basal leaves

petiole 3–18(–31) cm;

blade usually reniform, rarely orbiculate-cordate, 3–7-lobed to 1/2–3/4 its length, (2.5–)4–8(–12) × (3–)5–13(–15.5) cm, margins usually 2–3-times dentate, rarely crenate.
Cauline leaves

stipules 1–8 mm, either expansions of petiole base, fringed with brown hairs, or foliaceous.
Inflorescences

± pyramidal, 5–20(–30)-flowered per primary branch.
Pedicels

densely stipitate-glandular.
Flowers

hypanthium campanulate to turbinate, free portion 0.7–1 mm, densely stipitate-glandular;

sepals erect, lanceolate to narrowly lanceolate, 1–2(–2.5) mm, apex acute;

petals spatulate to ovate, 3–6 × 1–3 mm, 2–3(–4) times as long as sepals, base tapered to claw, margins plane;

nectary green;

stamens 0.9–1.4 mm;

ovary subinferior.
Capsules

ovoid, turbinate, or urceolate.
Seeds

usually black, tuberculate.
2n

= 14.

Boykinia aconitifolia
Phenology Flowering summer.
Habitat Moist woodland, margins of lakes, ponds, and watercourses
Elevation 300-1000 m (1000-3300 ft)
Distribution
from FNA
AL; GA; KY; NC; SC; TN; VA; WV
[BONAP county map]
Discussion

Boykinia aconitifolia from Alabama and Georgia with turbinate capsules and rounded-ovate leaf marginal teeth have been separated as B. turbinata from plants with the more usual urceolate capsules and leaf margins with ovate or triangular teeth. These characters, however, are not closely correlated and it seems better to recognize a single variable species. It is sometimes grown in gardens.

Rafinesque applied the name Therofon napelloides to this species, citing Nuttall’s Boykinia aconitifolia as a synonym. The former is therefore illegitimate.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 8, p. 126.
Parent taxa Saxifragaceae > Boykinia
Sibling taxa
B. intermedia, B. major, B. occidentalis, B. richardsonii, B. rotundifolia
Synonyms B. turbinata, Saxifraga aconitifolia, Therofon aconitifolium, Therofon turbinatum
Name authority Nuttall: J. Acad. Nat. Sci. Philadelphia 7: 113. 1834 ,
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).



Type/paste one or more Latin names into the boxes above; matching taxa will show up below the box as you type. You can use the up/down arrow keys to move through the list.

(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Fabaceae, Apiaceae, Boraginaceae, and Polemoniaceae.)

Choose a data source: Flora of North America

The species comparison tool is brought to you by:
Northwest Wildflowers