Gentiana platypetala |
Gentiana decora |
|
---|---|---|
broad-petal gentian |
Appalachian gentian, mountain gentian, showy gentian |
|
Habit | Herbs perennial, 0.5–3.5 dm, glabrous. | Herbs perennial, 1.5–6 dm, puberulent on stems and calyx tubes. |
Stems | 1–5, terminal from caudex, erect or nearly so. |
1–4, terminal from caudex, decumbent to erect. |
Leaves | cauline, ± evenly spaced; blade widely ovate to elliptic, 1.5–4 cm × 8–22 mm, apex obtuse. |
cauline, ± evenly spaced or somewhat more widely spaced distally; distal blades lance-elliptic to ovate-elliptic, 3–10 cm × 7–40 mm, apex acute to acuminate; proximal blades oblanceolate to obovate, apex obtuse to acute. |
Inflorescences | solitary flowers or occasionally a terminal pair. |
± dense 1–15-flowered cymes or heads, sometimes with additional flowers at 1–3 nodes or on short branches. |
Flowers | calyx 8–12 mm, tube cleft to base or nearly so into 2 spathaceous segments, lobes elliptic to ovate-lanceolate, 0.5–5 mm, margins not ciliate; corolla bright blue, campanulate, open, 30–38 mm, lobes widely ovate-triangular, 6–11 mm, free portions of plicae spreading, low-triangular, less than 1 mm, notched at apex, otherwise entire; anthers distinct. |
calyx 10–20 mm, lobes ± erect, subulate to linear or occasionally oblanceolate, 2–8(–12) mm, margins ciliate; corolla white to pale or occasionally medium blue or violet, tubular, loosely closed to fully but narrowly open, 25–45 mm, lobes ovate-triangular, 3–6 mm, longer than plicae, free portions of plicae divided 1/2 or more of their length into 2 unequal, ± triangular, lacerate segments, narrower segment usuallly deflexed; anthers connate. |
Seeds | not winged. |
winged. |
2n | = 26. |
|
Gentiana platypetala |
Gentiana decora |
|
Phenology | Flowering late summer. | Flowering fall. |
Habitat | Alpine and coastal mountain meadows, heathlands, rocky and boggy slopes. | Mesic woods, roadsides. |
Elevation | 0–1400(–2100) m. (0–4600(–6900) ft.) | 600–1600 m. (2000–5200 ft.) |
Distribution |
AK; BC |
GA; KY; NC; SC; TN; VA; WV
|
Discussion | Gentiana platypetala is restricted to sites near the Pacific largely confined to the insular ranges of British Columbia and southern Alaska from northern Vancouver Island, Queen Charlotte Islands, and Alice Arm, British Columbia, northwest to Kodiak Island, Alaska, but occasionally on mainland coastal ranges. The distinctive spathaceous calyces of this species are strongly suffused with reddish purple. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Hybrids of Gentiana decora with G. austromontana, G. clausa, and G. saponaria are known. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 14. | FNA vol. 14. |
Parent taxa | Gentianaceae > Gentiana | Gentianaceae > Gentiana |
Sibling taxa | ||
Synonyms | G. covillei, G. gormanii | Dasystephana decora |
Name authority | Grisebach in W. J. Hooker: Fl. Bor.-Amer. 2: 58. (1837) | Pollard: Proc. Biol. Soc. Wash. 13: 131. (1900) |
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