Heuchera micrantha var. diversifolia Douglas ex Lindl. (Rydb.) Rosend., Butters & Lakela
small-flowered alumroot (crevice alumroot)
Saxifragaceae (Saxifrage family)

Introduction to Vascular Plants

Photograph

© Hans Roemer     (Photo ID #10675)


Map

E-Flora BC Static Map

Distribution of Heuchera micrantha var. diversifolia
Click here to view the full interactive map and legend

Species Information

General:
Perennial herb from well-developed, horizontal to ascending rhizomes, clothed with old, brown leaf-bases and stipules; stems 1 to several, erect, 15-60 cm tall, long soft-hairy below, strongly glandular-hairy in the inflorescence.
Leaves:
Basal leaves kidney- to heart-egg-shaped, 3-8 cm wide, either shorter than wide with 5 to 7 rounded, shallow lobes, or longer than wide with pointy lobes cleft 1/3 their length, stiff-hairy below, sometimes also above, stalked, the stalks long, sparsely to densely hairy or rarely smooth; stem leaves 1 or 2, greatly reduced, the upper bract-like; stipules membranous, fused to the leaf-stalks.
Flowers:
Inflorescence an open, many-flowered cluster, the branches and flower-stalks thread-like, the bracts linear; petals white, 5, 2- to 4-times longer than sepals, clawed, the claws slender, blades diamond- to spoon-shaped; calyces greenish-yellow, bell-shaped, long-soft-hairy, joined to ovary almost to top, the free hypanthium about 0.5 mm long; calyx lobes 5, oblong-egg-shaped, about 2/3 length of lower portion; stamens 5, longer than calyx lobes.
Fruits:
Capsules, 5-6 mm long, egg-shaped, opening along the beaks; seeds deep brownish-purple, 0.6-0.7 mm long, with lengthwise rows of 25-30 spines.

SourceThe Illustrated Flora of British Columbia

Illustration

If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

Ecology

Ecological Framework for Heuchera micrantha var. diversifolia

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class

Avg

Min

Max

Elevation (metres)
545 545 545
Slope Gradient (%)
0 0 0

Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]

0
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
5 5 6
Modal Nutrient Regime
Class
E
# of field plots
 species was recorded in:
2
Modal BEC Zone Class
IDF

All BEC Zones (# of stations/zone) species was recorded in

IDF(2)

Habitat and Range

Moist to dry streambanks, rock crevices and talus slopes from the lowland to subalpine zones; infrequent in NW BC, frequent on Vancouver Island and the adjacent mainland; S to WA and CA.

SourceThe Illustrated Flora of British Columbia

Synonyms

Synonyms and Alternate Names:
Heuchera diversifolia Rydb.
Heuchera micrantha var. pacifica Rosend., Butters & Lakela