Flora of North America species comparison

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Anemone deltoidea

Columbia windflower, Columbian windflower, three-leaf anemone, western white anemone, windflower
Aerial shoots

(7.5-)10-30 cm, from rhizomes, rhizomes horizontal.
Basal leaves

0-2, ternate;

petiole 10-15 cm;

terminal leaflet sessile, ovate to rhombic, (2.5-)3-5(-6) × (2-)2.5-3.5 cm, base slightly oblique to broadly cuneate, margins crenate to serrate on distal 2/3, apex acuminate, surfaces abaxially glabrous, rarely puberulous on veins, adaxially usually glabrous;

lateral leaflets unlobed, rarely 1x-lobed; ultimate lobes (8-)10-20 mm wide.
Inflorescences

1-flowered;

peduncle sparsely hispid or glabrous;

involucral bracts 3, 1-tiered, simple, ±similar to terminal leaflets of basal leaves, ovate, rarely rhombic, (2.5-)4-8 cm, bases distinct, broadly cuneate, margins crenate to serrate, or dentate on distal 2/3, apex acuminate, surfaces usually glabrous;

lateral leaves unlobed or occasionally 1x-lobed; ultimate lobes 8-15 mm wide.
Flowers

sepals usually 5, white, ovate to obovate, rarely oblanceolate, (12-)15-25 × (8-)10-15(-20) mm, glabrous;

stamens 100-120.
Achenes

body ovoid, swollen, 2.5-4 × 2-3 mm, not winged, proximally hispid, distally glabrous;

beak straight to subulate, 0.5 mm or less, glabrous.
Heads of achenes

spheric;

pedicel (5-)7-12 cm.
2n

=14.

Anemone deltoidea
Phenology Flowering spring–summer (Apr–Jul).
Habitat Open to deep woods
Elevation 200-2000 m (700-6600 ft)
Distribution
from FNA
CA; OR; WA
[WildflowerSearch map]
[BONAP county map]
Discussion

Reports of Anemone deltoidea in British Columbia are erroneous (H.J. Scoggan 1978-1979, vol. 3).

Rhizomes 7m long and about 2 mm in diameter have been observed in Anemone deltoidea.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 3.
Parent taxa Ranunculaceae > Anemone
Sibling taxa
A. acutiloba, A. americana, A. berlandieri, A. canadensis, A. caroliniana, A. cylindrica, A. drummondii, A. edwardsiana, A. grayi, A. lancifolia, A. lyallii, A. multiceps, A. multifida, A. narcissiflora, A. occidentalis, A. okennonii, A. oregana, A. parviflora, A. patens, A. piperi, A. quinquefolia, A. richardsonii, A. tuberosa, A. virginiana
Name authority Hooker: Fl. Bor.-Amer. 1: 6. (1829)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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