Trifolium campestre |
Trifolium dedeckerae |
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field clover, hop clover, hop trefoil, low hop-clover, pinnate hop clover |
Dedecker's clover |
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Habit | Herbs annual, 5–40 cm, slightly villous or glabrous. | Herbs perennial, 20–25 cm, glabrous. |
Stems | erect to ascending, branched. |
± erect, loosely cespitose, branched. |
Leaves | pinnate; stipules ovate-lanceolate, 0.5–0.8 cm, margins entire, glandular, apex acuminate; petiole 0.3–2 cm; lateral leaflet petiolules 0.5–0.6 mm, terminal leaflet stalk 3–5 mm; leaflets 3, blades rhombic to obovate, 0.4–1.5 × 0.4–0.8 cm, base cuneate, lateral veins prominent, ± parallel, ascending, margins denticulate distally, apex truncate or retuse, surfaces strigose adaxially. |
basal and cauline, palmate; stipules ovate, 1.1–1.5 cm, margins entire, apex acuminate-subulate; petiole 5–15 cm; petiolules absent; leaflets 3, blades lanceolate to linear, 2–4 × 0.1–0.6 cm, base cuneate, veins prominent, margins remotely serrate, apex acute, surfaces glabrous. |
Inflorescences | axillary, 30–60-flowered, globose or broadly ovoid, 0.8–1.5 × 0.7–1 cm; involucres absent. |
terminal or axillary, 10–18-flowered, ellipsoid to subglobose, 1.8–2.2 × 2.3–2.5 cm, rachis prolonged beyond flowers, undivided or forked, often bearing sterile flower buds distally; involucres absent. |
Peduncles | 1.5–3.5 cm. |
7–16 cm, slightly twisted apically. |
Pedicels | reflexed, 0.7–1.2 mm; bracteoles a fringe of red setae. |
strongly reflexed in fruit, 0.5 mm; bracteoles minute. |
Flowers | 4.3–5 mm; calyx campanulate, strongly bilabiate, 1.3–1.5 mm, glabrous, veins 5, tube 0.3–0.6 mm, lobes unequal, adaxial deltate, very short, lateral and abaxial linear-subulate, each tipped with 1 or 2 stiff hairs, orifice open; corolla yellow becoming brown, 3.5–6 mm, ribbed, banner persistent, obovate, enveloping other petals, boat-shaped, 4.3–5 × 2.8–3.2 mm, apex broad, acute. |
13–15 mm; calyx tubular-campanulate, 6–8.5 mm, glabrous, veins 10, tube 2–2.5 mm, lobes unequal, triangular-subulate, orifice open; corolla pink to purple, 15 mm, banner oblong, 14–16 × 6–7 mm, apex acute or apiculate. |
Legumes | stipitate, oblong, 2–2.5 mm. |
ellipsoid, 5 mm. |
Seeds | 1 or 2, yellow, ellipsoid, 1–1.5 mm, smooth, lustrous. |
1 or 2, brown, flattened ovoid, 2 mm, smooth. |
2n | = 14. |
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Trifolium campestre |
Trifolium dedeckerae |
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Phenology | Flowering Jun–Aug. | Flowering May–Jun. |
Habitat | Roadsides, fields. | Rock crevices, dry slopes. |
Elevation | 0–1700 m. (0–5600 ft.) | 2100–3400 m. (6900–11200 ft.) |
Distribution |
AK; AL; AR; AZ; CA; CT; DC; DE; FL; GA; IA; ID; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; MT; NC; ND; NE; NH; NJ; NM; NY; OH; OK; OR; PA; RI; SC; TN; TX; VA; VT; WA; WI; WV; WY; BC; NB; NF; NS; ON; PE; QC; SPM; Europe; w Asia; n Africa [Introduced in North America; introduced also in South America, e Asia (China), s Africa, Pacific Islands (Hawaii, New Zealand), Australia]
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CA |
Discussion | Trifolium filiforme Linnaeus and T. procumbens Linnaeus are rejected names that were used historically for T. campestre (J. E. Dandy 1958; N. J. Turland et al. 1996). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Trifolium dedeckerae is known from Inyo, Kern, Mono, and Tulare counties. It is similar to T. macilentum and T. productum, from which it differs by its much narrower leaflets (J. M. Gillett 1972). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | Fabaceae > subfam. Faboideae > Trifolium | Fabaceae > subfam. Faboideae > Trifolium |
Sibling taxa | ||
Synonyms | Chrysaspis campestris | T. kingii subsp. dedeckerae, T. macilentum var. dedeckerae |
Name authority | Schreber in G. F. Hoffmann: Deutschl. Fl. 4: 16, plate 253. (1804) | J. M. Gillett: Madroño 21: 451, fig. 1. (1972) |
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