Trifolium brandegeei |
Trifolium obtusiflorum |
|
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Brandegee's clover |
clammy clover, creek clover |
|
Habit | Herbs perennial, 5–15 cm, glabrous. | Herbs annual, 2–100 cm, resinous stipitate-glandular. |
Stems | cespitose, short-branched. |
erect or ascending, branched. |
Leaves | palmate; stipules broadly lanceolate, 1–1.5 cm, margins entire, apex acute-acuminate; petiole 0.6–1.2 cm; petiolules to 0.5 mm; leaflets 3, blades ovate, oblong-elliptic, or elliptic, 0.8–3 × 0.4–1.5 cm, base cuneate, veins moderately thickened, margins entire or faintly serrate, apex acute to rounded or minutely apiculate, surfaces glabrous. |
palmate; stipules ovate, 1–1.5 cm, sheathing, margins deeply lacerate, apex acuminate; petiole 1.5–10 cm; petiolules to 0.5 mm; leaflets 3, blades elliptic, lanceolate, oblanceolate, rhombic, or obovate, 1.5–4 × 0.3–1.7 cm, base cuneate, veins thickened, margins coarsely spinulose-serrate, apex acute, mucronate, surfaces glandular. |
Inflorescences | terminal, 4–15-flowered, ovoid-ellipsoid, 2.5–4 × 2.2–3 cm, rachis prolonged ca. 10 mm beyond distalmost flower; involucres absent. |
axillary or terminal, 10–50-flowered, globose or ovoid, 1–3.5 × 1–3 cm; involucres flattened or bowl-shaped, 3–8 mm, when folded, not hiding flowers except proximally, incised 1/4–1/3 their length. |
Peduncles | 6–20 cm. |
3–15 cm, glandular. |
Pedicels | strongly reflexed, 1–2 mm; bracteoles linear, minute. |
erect, 1 mm; bracteoles absent. |
Flowers | 15–18 mm; calyx whitish, campanulate, 7–10 mm, sparsely pubescent, veins 10, tube 4–5 mm, lobes subequal, longer than tube, narrowly triangular, acuminate, orifice open; corolla purple to magenta, 15–18 mm, banner broadly ovate, 15–17 × 7–9 mm, apex obtuse or retuse. |
13–20 mm; calyx tubular-campanulate, slit between adaxial lobes, 10–13 mm, glandular, veins 20+, tube 5–7 mm, lobes unequal, narrowly triangular or lanceolate-subulate, usually entire, rarely 3-fid or shouldered below apex, orifice open; corolla white or pale pinkish with dark purple spot, 10–18 mm, banner broadly elliptic, 10–18 × 2–4 mm, apex blunt. |
Legumes | oblong, 6.5–7 mm. |
obovoid, 3.5–4 mm. |
Seeds | 1–3, yellow and red, flattened ovoid, 2–2.5 mm, smooth. |
1 or 2, brown, mottled, ellipsoid or mitten-shaped, 2.5 mm, smooth. |
2n | = 16. |
= 16. |
Trifolium brandegeei |
Trifolium obtusiflorum |
|
Phenology | Flowering Jul–Aug. | Flowering Apr–Jul. |
Habitat | Open montane forests and subalpine areas. | Moist swales, creek bottoms. |
Elevation | 3500–3700 m. (11500–12100 ft.) | 0–1600 m. (0–5200 ft.) |
Distribution |
CO; NM
|
CA; OR; Mexico (Baja California, Sinaloa)
|
Discussion | A close relationship between Trifolium brandegeei and T. parryi was hypothesized by J. M. Gillett (1965); this has not been borne out by flavonoid chemosystematics (E. V. Parups et al. 1966) or DNA analyses (N. W. Ellison et al. 2006). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Trifolium obtusiflorum is much less common than the similar T. willdenovii, occurring in moist areas in cismontane California and north into Oregon (W. L. Jepson [1923–1925]). It is easy to distinguish from T. willdenovii by its glandularity, which causes fresh specimens to be sticky to the touch. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | T. majus, T. roscidum, T. tridentatum var. obtusiflorum | |
Name authority | S. Watson: Proc. Amer. Acad. Arts 11: 130. (1876) — (as brandegei) | Hooker: Bot. Beechey Voy., 331. (1838) |
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