Thalictrum sect. Heterogamia

(de Candolle) B. Boivin

Rhodora 46: 432. 1944.

Basionym: Heterogamia de Candolle Syst. Nat. 1: 172. 1817 (as Heterogama)
Treatment appears in FNA Volume 3.

Inflorescences panicles, racemes, or corymbs. Flowers unisexual (rarely also bisexual in T. debile and T. fendleri); sepals 4 (-6); filaments filiform (to slightly clavate in T. heliophilum). Achenes sessile to nearly sessile.

Distribution

North America, Mexico

Discussion

Species 25 (11 in the flora).

Selected References

None.

sessile +  and nearly sessile +
Marilyn M. Park +  and Dennis Festerling Jr. +
(de Candolle) B. Boivin +
cuneate +, truncate +  and cordate +
Heterogamia +
straight +
0 cm0 mm <br />0 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
globose;cylindric +
North America +  and Mexico +
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 +
compound +  and simple +
whorled +, opposite +  and alternate +
cauline +  and basal +
3-lobed +, linear +, lanceolate +, obovate +  and cordate-reniform +
palmate +  and pinnate +
crenate;entire +
(1-)2-200-flowered +
distinct +
conspicuous +
reduced +
1 +  and 16 +
not arillate +  and stalked +
whitish;greenish yellow or purplish +
not persistent +
distinct +
lanceolate +  and reniform or spatulate +
0.1 cm1 mm <br />0.001 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
ribbed +  and veined +
persistent +
Thalictrum sect. Heterogamia +
Thalictrum +
section +
herbaceous +  and woody +