''Agastache cusickii'' is a species of flowering plant in the mint family known by the common name Cusick's giant hyssop. It is native to the northwestern United States from eastern Oregon and central Nevada to Idaho and Montana.''Agastache cusickii''.
The Nature Conservancy. This perennial herb grows 10 to 20 centimeters tall from a woody taproot and

caudex A caudex (plural: caudices) of a plant is a stem, but the term is also used to mean a rootstock and particularly a basal stem structure from which new growth arises.pages 456 and 695 In the strict sense of the term, meaning a stem, "caudex" is m ...

.Matthews, Robin F. 1993
''Agastache cusickii''
In: Fire Effects Information System, nline U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory. Some of the stems spread horizontally underground. It has leaves covered in fine hairs and the fruits are nutlets. The spikelike inflorescence bears flowers with purple-tipped sepals and white corollas each about a centimeter long with protruding

stamen The stamen (plural ''stamina'' or ''stamens'') is the pollen-producing reproductive organ of a flower. Collectively the stamens form the androecium., p. 10 Morphology and terminology A stamen typically consists of a stalk called the filame ...

s. Blooming occurs in June through August. This plant grows in sagebrush and alpine ecosystems. It grows in dry, rocky mountain habitat such as talus slopes. In Nevada it grows in limber pine and pinyon-juniper woodland habitat. On Steens Mountain in Oregon it has been observed among western juniper (''Juniperus occidentalis''), curlleaf mountain-mahogany (''Cercocarpus ledifolius''), and quaking aspen (''Populus tremuloides''). In the Tendoy Mountains of Montana it is associated with

big sagebrush ''Artemisia tridentata'', commonly called big sagebrush,MacKay, Pam (2013), ''Mojave Desert Wildflowers'', 2nd ed., , p. 264. Great Basin sagebrush or (locally) simply sagebrush, is an aromatic shrub from the family Asteraceae, which grows in ari ...

(''Artemisia tridentata'') and

Indian ricegrass ''Eriocoma hymenoides'' (common names: Indian ricegrass and sand rice grass) is a cool-season, perennial bunchgrass with narrow, rolled leaf blades.Mojave Desert Wildflowers, Pam MacKay, 2nd Ed., p287 It is native to western North America east of ...

(''Oryzopsis hymenoides'') on limestone talus.

References

External links

USDA Plants Profile
{{Taxonbar, from=Q4691435 cusickii Endemic flora of the United States Flora of Idaho Flora of Montana Flora of Nevada Flora of Oregon Taxa named by Amos Arthur Heller