Geum rossii Ser.

Ross' avens (en)

Species

Angiosperms > Rosales > Rosaceae > Geum

Characteristics

Plants subscapose. Stems 4–28 cm, glabrous or downy, ?hairs to 1 mm, sometimes septate-glandular?. Leaves: basal 3–13 cm, blade pinnate to interruptedly pinnate, major leaflets 13–26, alternating with 0–14 minor ones, terminal leaflet slightly larger than major laterals; cauline 0.7–2 cm, stipules adnate to leaf, indistinguishable from pair of lobes, blade ?bractlike, not resembling basal, alternate?, simple, pinnatifid to 3-fid. Inflorescences 1–3(–4)-flowered. Pedicels woolly, sometimes glandular. Flowers erect; epicalyx bractlets 1.5–7 mm; hypanthium green, slightly purple-tinged to strongly purple; sepals erect to erect-spreading, 3–10 mm; petals spreading, yellow, obovate to nearly orbiculate, 5–12(–17) mm, longer than sepals, apex broadly rounded to irregularly emarginate. Fruiting tori sessile, glabrous. Fruiting styles wholly persistent, not geniculate-jointed, 2–5(–10) mm, apex not hooked, glabrous throughout or pilose only at base. 2n = 56.
Life form perennial
Growth form herb
Growth support -
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.1 - 0.3
Root system -
Rooting depth (meter) 0.4
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

Light 7-9
Soil humidity 2-4
Soil texture 3-4
Soil acidity -
Soil nutriment -
Hardiness (USDA) 4-9

Usage

Uses -
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) 21 - 28
Germination temperacture (C°) 18 - 21
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Leaf

Geum rossii leaf picture by Eylisia (cc-by-sa)

Distribution

Geum rossii world distribution map, present in Canada, Greenland, and United States of America

Identifiers

LSID urn:lsid:ipni.org:names:725360-1
WFO ID wfo-0001016874
COL ID 3FYDB
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Acomastylis rossii Sieversia rossii Geum rossii

Lower taxons

Geum rossii var. turbinatum