Thalictrum minus

Linnaeus

Sp. Pl. 1: 546. 1753.

Illustrated
Synonyms: Thalictrum minus subsp. kemense (Fries) Hultén Thalictrum minus var. stipellatum (C. A. Meyer) Tamura
Treatment appears in FNA Volume 3.

Stems erect, nearly cespitose or rhizomatous, 15-150 cm, glabrous or somewhat glandular. Leaves basal, 7-30 cm. Leaf-blade 3-4-ternate; leaflets nearly orbiculate or broadly ovate, irregularly 2-3-lobed or margins dentate in distal 1/2, 15-30 mm, surfaces glabrous to glandular. Inflorescences panicles with long branches, many flowered. Flowers: pedicels not recurved in fruit; sepals yellowish green, ovate, 3-4 mm; stamens 10-15; anthers yellowish, 2-3 mm. Achenes 3-15, sessile; body broadly ovoid to narrowly oblong-ovoid, 2.5-4 mm, ± weakly veined.


Phenology: Flowering late spring–summer (Jun–Jul).
Habitat: Steppe meadows, shrub thickets, forest margins, and forest meadows
Elevation: 0-300 m

Discussion

Thalictrum minus has been reported from mainland Alaska (E. Hultén 1968); we have been able to confirm its occurrence only in the Aleutian Islands.

Initially pendent, the flowers become erect. The beak is 0.75-1 mm, much shorter than the achene, and not fimbriate.

Selected References

None.

Lower Taxa

None.
... more about "Thalictrum minus"
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Marilyn M. Park +  and Dennis Festerling Jr. +
Linnaeus +
cuneate +, truncate +  and cordate +
straight +
0 cm0 mm <br />0 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
broadly ovoid;narrowly oblong-ovoid +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
globose;cylindric +
Alaska +  and Eurasia +
0-300 m +
sessile +  and pedicellate +
showy +  and inconspicuous +
unisexual +
0 cm0 mm <br />0 m <br /> (41 cm410 mm <br />0.41 m <br />) +
stipitate +, sessile +  and aggregate +
falcate;ovoid;obovoid +
Steppe meadows, shrub thickets, forest margins, and forest meadows +
compound +  and simple +
whorled +, opposite +  and alternate +
7 cm70 mm <br />0.07 m <br /> (30 cm300 mm <br />0.3 m <br />) +
2-3-lobed +, ovate +  and orbiculate +
palmate +  and pinnate +
crenate;entire +
(1-)2-200-flowered +
distinct +
conspicuous +
reduced +
Flowering late spring–summer (Jun–Jul). +
1 +  and 16 +
not arillate +  and stalked +
yellowish green +
not persistent +
distinct +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
ribbed +  and veined +
Illustrated +
rhizomatous +
15 cm150 mm <br />0.15 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
persistent +
glabrous;glandular +
Thalictrum minus subsp. kemense +  and Thalictrum minus var. stipellatum +
Thalictrum minus +
Thalictrum sect. Thalictrum +
species +
herbaceous +  and woody +