Gentiana.]
GENTIANEÆ.
447
D. Perennial, rarely annual, erect. Radical leaves usually rosulate, crowded; cauline few, in distant pairs, sessile. Flowers large, ¾ in. diam. or more, in terminal cymes or umbels, rarely solitary. | |
Annual. Flowering stems 6–12 in., sometimes with decumbent branches from the base. Radical leaves ½–1¼ in., ovate or broadly oblong, membranous. Flowers rather small, in involucrate umbels | 4. G. chathamica. |
Usually perennial. Flowering stems single or more rarely branched from the base, stout, erect, 6–20 in. Leaves yellow-green when dry; radical 1–4 in., linear- or oblong-spathulate; cauline 1–2 distant pairs, linear-oblong. Calyx short | 5. G. corymbifera. |
Perennial. Flowering stems usually single, very slender, 6–20 in. Leaves black when dry; radical ½–1 in., ovate-lanceolate; cauline 2–5 remote pairs | 6. G. Townsoni. |
Flowering stems usually single, often tall and stout, 10–24 in. Radical leaves ¾–1½ in., obovate-spathulate; cauline broadly ovate, often cordate at the base | 7. G. montana. |
Flowering stems one or several, often decumbent below, 5–20 in. Radical leaves 1–3 in., oblong-spathulate, cauline 1–5 opposite pairs. Flowers in lax corymbose cymes or umbels | 8. G. patella. |
Flowering stems several, short. 1–6 in. Radical leaves ⅓–1½ in., spathulate or linear-spathulate. Flowers in 2–6-flowered cymes or solitary | 9. G. bellidifolia. |
Flowering stems excessively branched from the base, often forming rounded masses 2–6 in. diam. Radical leaves 1–3 in., oblong- or obovate-spatiiulate. Flowers in dense corymbose cymes | 10. G. divisa. |
E. Annual, erect. Radical leaves numerous, rosulate, obovate-spathulate; cauline few, petiolate. Flowers in 3–5-flowered involucrate umbels. | |
Flowering stems several, 4–10 in. Flowers small, ⅓–½ in. diam. Calyx equalling the corolla or nearly so | 11. G. Spenceri. |
F. Prostrate or decumbent or suberect, leafy. Leaves spathulate; cauline numerous, petiolate. Flowers in few-flowered cymes or clustered at the ends of the branches. | |
Perennial, prostrate at the base. Leaves ¾–1¾ in., linear-spathulate, long-petioled. Calyx much shorter than the corolla; lobes recurved at the tip | 12. G. saxosa. |
Perennial, prostrate at the base, 4–14 in. Leaves ½–1½ in., obovate-spathulate, fleshy, shining. Calyx almost equalling the corolla; lobes not recurved | 13. G. cerina. |
Annual, ascending or erect, 1–4 in. Leaves ⅓–1 in., linear-oblong. Calyx almost equalling the corolla | 14. G. concinna. |
G. Stout, erect, 3–10 in. high, fastigiately branched, densely leafy. Flowers small, ⅓ in. long, almost hidden by the cauline leaves and bracts. | |
Annual. Radical leaves 1–2 in., oblong or oblong-spathulate | 15. G. antarctica. |
Perennial. Radical leaves ¾–1¼ in., lingulate or linear-spathulate | 16. G. antipoda. |