E-Flora BC: Electronic Atlas of the Flora of British Columbia

Heuchera cylindrica Douglas ex Hook.
round-leaved alumroot (roundleaf alumroot)
Saxifragaceae (Saxifrage family)

Introduction to Vascular Plants

© Gordon Neish  Email the photographer   (Photo ID #16038)

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Distribution of Heuchera cylindrica
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Species Information

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PDSAX0E092
PDSAX0E093


General:
Perennial herb from short, thick rhizomes; stems erect, 15-90 cm tall, smooth to finely glandular-hairy or stiff-hairy below, glandular-hairy above, naked or with 1 to 3 brownish or greenish bracts.
Leaves:
Basal leaves egg-shaped to nearly heart- or kidney-shaped, 1-6 cm wide, shorter or longer than wide, palmately-lobed, the lobes round-toothed, smooth or finely glandular-hairy to stiff-hairy; long-stalked, the stalks smooth to minutely glandular short-hairy or with conspicuous white hairs intermixed with short glandular hairs; stem leaves lacking; stipules membranous, fused to the leaf stalks.
Flowers:
Inflorescence spike-like, becoming open, 3-12 (20) cm long; petals white to greenish-yellow, 5, often absent or partly absent, linear, much shorter than calyx lobes; calyces greenish-yellow to cream-coloured, narrowly bell-shaped, joined to ovary almost to top, the free hypanthium slightly to strongly lop-sided, equal to or longer than part joined to ovary, lined with a thin to thick, somewhat glandular disk, calyx lobes 5, oblong-lanceolate to egg-shaped and overlapping, erect, longer than the hypanthium; stamens 5, opposite and shorter than calyx lobes.
Fruits:
Capsules, 6-10 mm long, opening along the beaks; seeds dark brown, 0.6-0.9 mm long, with lengthwise rows of slender, straight to curved spines.
Notes:
Four intergrading and largely sympatric varieties occur in BC .

1. Leaf stalks smooth to minutely glandular-short-hairy; plants mainly of SE BC.

2. Largest leaves 3.2-8.0 cm long, the teeth not or only slightly mucronate...................var. glabella (T.& G.) Wheelock

2. Largest leaves 2.2-4.8 cm long, the teeth usually strongly mucronate......................var. septentrionalis Rosend., Butters & Lakela

1. Leaf stalks generally with conspicuous white hairs intermixed with short glandular hairs; plants mainly of SC BC.

3. Largest leaves 3.0-8.5 cm long, the bases slightly to strongly heart-shaped ..........................var. cylindrica

3. Largest leaves 2.0-6.0 cm long, the bases squared-off or slightly heart-shaped..........................var. orbicularis (Rosend., Butters & Lakela) Calder & Savile

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

Flower Colour:
White
Blooming Period:
Mid Spring
Fruit/Seed characteristics:
Colour: Brown
Present from Summer to Fall
Source:  The USDA

Habitat / Range

Dry to mesic rocky places, cliffs and talus slopes from the lowland to alpine zones; common in S BC in and E of the Coast-Cascade Mountains; E to SW AB and S to WY, ID, NV and OR.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Heuchera cylindrica

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

Minimum

Average

Maximum

Elevation (metres) 247 1155 2854
Slope Gradient (%) 0 42 170
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
0 207 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 2 6
Modal Nutrient Regime
Class
C
Number of field plots
 species was recorded in:
1309
Modal BEC Zone Class
IDF
All BEC Zones (# of stations/zone) species was recorded in: AT(20), BG(118), BWBS(1), ESSF(208), ICH(199), IDF(462), IMA(4), MS(139), PP(119), SBPS(2), SBS(8)

Climate

The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Taxonomic and Nomenclatural Links

Additional Photo Sources

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General References