Trifolium andersonii |
Trifolium rollinsii |
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Anderson's clover, fiveleaf clover |
Rollins' clover |
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Habit | Herbs perennial, 5–12 cm, canescent. | Herbs perennial, 5–20 cm, glabrous. | ||||||||
Stems | erect-ascending, cespitose, mat-forming, branched; from deep taproot-like crown. |
ascending, cespitose, branched. |
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Leaves | palmate; stipules ovate or lanceolate, 0.5–1.5 cm, margins entire, apex long-acuminate; petiole 1–5 cm; petiolules to 0.5 mm; leaflets (3–)5, blades obovate, 0.5–2.2 × 0.2–1.2 cm, base cuneate, veins obscured by pubescence, margins entire, apex rounded or acute, apiculate, surfaces canescent. |
mostly basal, palmate; stipules ovate, 1 cm, margins entire, apex blunt; petiole 2–6 cm; petiolules to 1 mm; leaflets 3, blades obovate or rhombic, 0.6–1.3 × 0.6–1 cm, base cuneate, veins prominent, margins denticulate, apex rounded or retuse, apiculate, surfaces pale abaxially, glabrous. |
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Inflorescences | axillary, 10–20-flowered, depressed-globose, 1–2 × 1–2.3 cm; involucres formed of connate, narrow, membranous bracts, to 0.5 mm. |
terminal or axillary, 8–15-flowered, appearing turned to one side, obconic, 1.3–1.8 × 1.1–2.5 cm, rachis prolonged beyond flowers, undivided or forked, often bearing sterile flower buds distally; involucres absent. |
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Peduncles | 1–14 cm. |
curved distally proximal to flowers, 3–9 cm. |
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Pedicels | absent; bracteoles absent. |
reflexed, 1–1.2 mm; bracteoles minute. |
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Flowers | 10–17 mm; calyx campanulate, 9–11 mm, pilose, veins 10, tube 4–5 mm, lobes equal, subulate, plumose, orifice open; corolla white or pink, 10–17 mm, banner ovate-oblong, 12–19 × 3–5 mm, apex rounded, retuse. |
10–13 mm; calyx purple, campanulate, 5–6 mm, glabrous, veins 10, tube 3.5 mm, lobes equal, subulate, 2 mm, orifice open; corolla purple, often with white tips, 15 mm, banner obovate, 11–13 × 5–6 mm, apex flared. |
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Legumes | ellipsoid, 4–5 mm. |
not seen. |
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Seeds | 1 (or 2), tan or brown, irregularly ovoid, 1.6–2 mm, smooth, glossy. |
not seen. |
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Trifolium andersonii |
Trifolium rollinsii |
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Phenology | Flowering Jun–Aug. | |||||||||
Habitat | Wind-swept alpine areas. | |||||||||
Elevation | 3000–3100 m. (9800–10200 ft.) | |||||||||
Distribution |
w United States
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NV |
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Discussion | Subspecies 3 (3 in the flora). Trifolium andersonii encompasses three moderately well separable subspecies, with subsp. andersonii the more northern form in the range of the species, subsp. monoense in the southwestern portion of the range, and subsp. beatleyae in the eastern portion of the range (J. M. Gillett 1972). Intermediates between the latter two (and overlap in their ranges) make differentiation between them somewhat problematic, which prompted R. C. Barneby (1989) to combine them as var. beatleyae. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Trifolium rollinsii is known from the Toiyabe Range in Lander and Nye counties in central Nevada. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 11. | FNA vol. 11. | ||||||||
Parent taxa | Fabaceae > subfam. Faboideae > Trifolium | Fabaceae > subfam. Faboideae > Trifolium | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | T. kingii subsp. rollinsii, T. macilentum var. rollinsii | |||||||||
Name authority | A. Gray: Proc. Amer. Acad. Arts 6: 522. (1865) | J. M. Gillett: Madroño 21: 453, fig. 2. (1972) | ||||||||
Web links |