Geum glaciale

Adams ex Fischer

Mém. Soc. Imp. Naturalistes Moscou 2: 187, plate 11, fig. 20. 1809.

Common names: Glacier avens
Synonyms: Novosieversia glacialis (Adams ex Fischer) F. Bolle Sieversia glacialis (Adams ex Fischer) Sprengel
Treatment appears in FNA Volume 9. Treatment on page 62. Mentioned on page 59, 60.

Plants subscapose. Stems 2–30 cm, densely pilose, hairs 2–5 mm. Leaves: basal 3–10 cm, blade pinnate-pinnatifid, leaflets/lobes 11–23, terminal leaflet slightly larger; cauline 1.4–2.5 cm, stipules adnate to leaf, indistinguishable from lobes, blade bractlike, not resembling basal, alternate, simple, 3-fid. Inflorescences 1-flowered. Pedicels densely pilose, eglandular. Flowers erect; epicalyx bractlets 6–9 mm; hypanthium green; sepals spreading-erect, 7–14 mm; petals 5–9, spreading, yellow, obovate, orbiculate, or ovate, 10–20 mm, longer than sepals, apex rounded to emarginate. Fruiting tori sessile, silky. Fruiting styles wholly persistent, not geniculate-jointed, 18–30 mm, apex not hooked, pilose except distal 1–3 mm. 2n = 28.


Phenology: Flowering early summer.
Habitat: Tundra, rocky slopes, heaths
Elevation: 0–1400 m

Distribution

V9 84-distribution-map.jpg

N.W.T., Yukon, Alaska, Asia (n Russia)

Discussion

Flowers of Geum glaciale have from five to nine petals with seven being the most common. Other species of Geum nearly always have five petals, which is standard in most rosaceous genera. The sepals of G. glaciale are usually in two whorls for a total of about ten, and the bractlets are in two to three whorls. The exact number of epicalyx bractlets and sepals is made difficult to determine by the thick covering of hairs and because individual sepals and bractlets are sometimes deeply divided into two equal lobes.

Selected References

None.

Lower Taxa

None.
... more about "Geum glaciale"
pilose +  and silky +
Joseph R. Rohrer +
Adams ex Fischer +
compound +  and simple +
opposite +  and alternate +
3 cm30 mm <br />0.03 m <br /> (10 cm100 mm <br />0.1 m <br />) +
not alternate +
3-fid +, bractlike +  and pinnate-pinnatifid +
free +  and distinct +
1.4 cm14 mm <br />0.014 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Glacier avens +
N.W.T. +, Yukon +, Alaska +  and Asia (n Russia) +
not +  and aggregated +
0–1400 m +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (4.6 cm46 mm <br />0.046 m <br />) +
unisexual +  and bisexual +
not +  and aggregated +
tapered +, ovoid +  and fusiform +
0.2 cm2 mm <br />0.002 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
Tundra, rocky slopes, heaths +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
crassinucellate +
odd-pinnate +, lyrate-pinnate +, 3-foliolate +  and simple +
opposite +  and alternate +
winter-persistent +
cauline +  and basal +
cordate +, reniform +, orbiculate +, oblanceolate +, obovate +, oblong +, elliptic +  and rhombic +
palmate +  and pinnate +
crenate +, dentate +, laciniate +, 2-7-lobed +, flat +, lobed +, toothed +  and entire +
inferior +  and superior +
clustered +, biseriate +  and superposed +
purple-veined +
0 (?) +  and 4 (?) +
free +  and distinct +
5 +  and 9 +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Flowering early summer. +
adnate +, free +, connate +  and distinct +
Mém. Soc. Imp. Naturalistes Moscou +
not arillate +
persistent +
free +  and distinct +
spreading-erect +
deltate-lanceolate +, deltate-ovate +  and deltate +
0.7 cm7 mm <br />0.007 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
free +  and distinct +
1 +  and 5 +
2 cm20 mm <br />0.02 m <br /> (30 cm300 mm <br />0.3 m <br />) +
palmate +  and pinnate +
indistinguishable +
geniculate-jointed +  and entire +
persistent +
distinct +
elongating +
basal +, lateral +, subterminal +  and terminal +
hairy +  and glabrous +
not hooked +  and hooked +
accrescent +
10 cm100 mm <br />0.1 m <br /> (?) +
Novosieversia glacialis +  and Sieversia glacialis +
Geum glaciale +
species +
inconspicuous +
hemispheric +  and cylindric +
enlarged +
not geniculate-jointed +
1.8 cm18 mm <br />0.018 m <br /> (3 cm30 mm <br />0.03 m <br />) +
hairy +  and glabrous +