State Rank Reason (see State Rank above)
Trautvetteria caroliniensis in Montana occurs at the eastern edge of its northwestern North America distribution. It grows in western spruce-fir forests and subalpine meadows and becomes more abundant westerly into Idaho. Although it doesn't occupy a lot of habitat in Montana, populations appear to be stable and continuous with those in Idaho where it is found to be common.
Herbaceous perennial from short rhizomes and fibrous roots. Stems erect, 50–80 cm. Leaves basal and cauline, petiolate; the blade pubescent below, broadly cordate, deeply palmately lobed into 5 to 11 dentate segments; the basal to 30 cm across. Inflorescence a terminal corymb with numerous flowers, glandular and covered with dense, small, hooked hairs. Flowers perfect, radially symmetrical; sepals 3 to 5, greenish, ca. 3 mm long, deciduous; petals absent; stamens numerous, 4–8 mm long; pistils ca. 15, 1-seeded. Fruit a thin-walled and inflated achene (utricle) 2–3 mm long with a hooked beak (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
Populations in the western half of North America are recognized by many as var. occidentalis
(Gray) C.L. Hitchock.
Moist coniferous forest, often along streams and with red cedar; valleys, montane (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)