Geum aleppicum

Jacquin

Collectanea 1: 88, plate 127. 1787.

Common names: Yellow avens benoîte d’Alep
Illustrated
Synonyms: Geum aleppicum subsp. strictum (Fernald) R. T. Clausen G. aleppicum var. strictum Fernald G. decurrens G. strictum var. decurrens (Rydberg) Kearney & Peebles
Treatment appears in FNA Volume 9. Treatment on page 67. Mentioned on page 60, 61, 65, 68, 69.

Plants leafy-stemmed. Stems 30–120 cm, hirsute to sparsely hirsute. Leaves: basal 10–35 cm, blade interruptedly pinnate, major leaflets 5–9, alternating with 4–6 minor ones, terminal leaflet usually only slightly larger than major laterals; cauline 4–19 cm, stipules ± free, 8–28 × 5–22 mm, blade pinnate to 3-foliolate. Inflorescences 3–7-flowered. Pedicels puberulent, hirsute, eglandular. Flowers erect; epicalyx bractlets 2–3.5 mm; hypanthium green; sepals erect but soon reflexed, 4–8 mm; petals spreading, yellow, nearly orbiculate to broadly ovate or obovate, 5–9 mm, equal to or slightly longer than sepals, apex rounded, occasionally irregularly notched. Fruiting tori on 2–3 mm stipes, densely downy, hairs soft, 0.3–0.7 mm. Fruiting styles geniculate-jointed, proximal segment persistent, 3–6 mm, apex hooked, bristles on basal 1/3, eglandular, distal segment deciduous, 1–2 mm, pilose in basal 1/2, hairs much longer than diam. of style. 2n = 42.


Phenology: Flowering summer.
Habitat: Moist habitats, meadows, stream banks, alluvial thickets, swamps, forests, clearings, ditches, roadsides
Elevation: 0–2600 m

Distribution

V9 98-distribution-map.jpg

Alta., B.C., Man., N.B., N.W.T., N.S., Ont., P.E.I., Que., Sask., Yukon, Alaska, Ariz., Calif., Colo., Conn., Idaho, Ill., Ind., Iowa, Maine, Md., Mass., Mich., Minn., Mont., Nebr., N.H., N.J., N.Mex., N.Y., N.C., N.Dak., Ohio, Oreg., Pa., R.I., S.Dak., Tenn., Utah, Vt., Va., Wash., W.Va., Wis., Wyo., Mexico, Eurasia

Discussion

In the broad area where their ranges overlap, Geum aleppicum is often confused with G. macrophyllum var. perincisum. The two taxa are similar in habit and leaf form and they occupy the same habitats. Mixed collections mounted on one herbarium sheet are sometimes seen. One macroscopic clue useful in quickly sorting herbarium specimens is the color of the dried plants. Geum aleppicum often, but not always, darkens considerably upon drying and appears blackish green; G. macrophyllum is lighter and greener. In G. aleppicum, the epicalyx bractlets are always present and conspicuous; the bractlets are relatively small or absent in G. macrophyllum. In fruiting specimens, the styles of G. aleppicum have bristles at the base and are without glands; the styles of G. macrophyllum lack bristles and are nearly always stipitate-glandular. The bristles at the base of the style are a consistent and useful characteristic in fruiting specimens of G. aleppicum. Other species of avens may have bristles on the achenes; no others (except for occasional specimens of G. laciniatum) have bristles on the styles.

Geum aleppicum hybridizes with G. rivale (= G. ×aurantiacum Fries ex Scheutz); see discussion under 8. G. rivale.

Geum strictum Aiton is a superfluous and illegitimate name for G. aleppicum.

Selected References

None.

Lower Taxa

None.
... more about "Geum aleppicum"
Joseph R. Rohrer +
Jacquin +
compound +  and simple +
opposite +  and alternate +
10 cm100 mm <br />0.1 m <br /> (35 cm350 mm <br />0.35 m <br />) +
pinnate +  and 3-foliolate +
orbiculate +, ovate +, elliptic +, obovate +  and oblanceolate +
free +  and distinct +
4 cm40 mm <br />0.04 m <br /> (19 cm190 mm <br />0.19 m <br />) +
Yellow avens +  and benoîte d’Alep +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Alta. +, B.C. +, Man. +, N.B. +, N.W.T. +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Yukon +, Alaska +, Ariz. +, Calif. +, Colo. +, Conn. +, Idaho +, Ill. +, Ind. +, Iowa +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Mont. +, Nebr. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Oreg. +, Pa. +, R.I. +, S.Dak. +, Tenn. +, Utah +, Vt. +, Va. +, Wash. +, W.Va. +, Wis. +, Wyo. +, Mexico +  and Eurasia +
not +  and aggregated +
0–2600 m +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 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 />) +
Moist habitats, meadows, stream banks, alluvial thickets, swamps, forests, clearings, ditches, roadsides +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 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 +
hirsute +  and puberulent +
purple-veined +
0 (?) +  and 4 (?) +
free +  and distinct +
slightly longer +
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
Flowering summer. +
adnate +, free +, connate +  and distinct +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Collectanea +
not arillate +
persistent +
free +  and distinct +
reflexed +  and erect +
deltate-lanceolate +, deltate-ovate +  and deltate +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Illustrated +
free +  and distinct +
1 +  and 5 +
30 cm300 mm <br />0.3 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
palmate +  and pinnate +
0.8 cm8 mm <br />0.008 m <br /> (2.8 cm28 mm <br />0.028 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
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 /> (?) +
Geum aleppicum subsp. strictum +, G. aleppicum var. strictum +, G. decurrens +  and G. strictum var. decurrens +
Geum aleppicum +
species +
usually only slightly larger +
inconspicuous +
hemispheric +  and cylindric +
enlarged +
geniculate-jointed +
hairy +  and glabrous +