Trollius albiflorus
Trollius riederianus
American globe-flower, globeflower, western globeflower, white globe-flower
Kamchatka globeflower
0.7-5.5 dm (to 8dm in fruit), base with few petioles persistent from previous year.
1.1-4.5(-6) dm, base with persistent thatch of petioles from previous years.
basal leaves with petioles 4-25 cm, some leaves reduced to sessile, ovate membranous scales;
cauline leaves 1-3(-5), with broad, clasping, membranous sheaths.
basal leaves with petioles 5-20(-40) cm;
cauline leaves 2-5, with broad, clasping, membranous sheaths.
2.5-5 cm diam.;
sepals 5-9, spreading, white when fresh (pale yellow to greenish white before anthesis), ovate to obovate or nearly orbiculate, 10-20 mm;
petals 15-25, yellow, 1/2-2/3 length of stamens when pollen shed, 3-6 mm.
3-6 cm diam.;
sepals 5-7(-12), spreading, somewhat incurved, orange-yellow when fresh, obovate to ovate-orbiculate, 15-27 mm;
petals 5-7, orange, ± length of stamens when pollen shed, 8-12 mm.
usually 11-14, 8-16 mm including beak;
beak often somewhat recurved, sometimes straight.
5-10, 7-10 mm including beak;
beak straight.
=16.
Trollius albiflorus
Trollius riederianus
The diploid Trollius albiflorus is isolated from the tetraploid T. laxus ecologically, geographically, and reproductively, although it often has been treated as a variety of the latter.
Identities of specimens of Trollius albiflorus and the superficially similar Anemone narcissiflora subsp. zephyra in Colorado and Wyoming are sometimes confused. Close examination reveals a number of differences. The anemone has sepals yellow (not white), leaf blades and flowering stems pilose to villous (not glabrous), achenes (not follicles), and leaflike bracts subtending the pedicels and whorled (leaves alternate in Trollius).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Trollius riederianus has been found in the flora only on the south side of Kiska Island in the western Aleutian Islands and at Cold Bay at the western end of the Alaska Peninsula; it is apparently native. The species is more widespread in eastern Asia, ranging from northern Japan and the coastal plain of China to the Russian Far East.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
BC
OR
WA
Flora NW
PNW Herbaria
SW CO Wildflowers
WildflowerSearch
iNaturalist
USDA Plants Database
