UW Burke Herbarium species comparison

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Trifolium macrocephalum

Trifolium oliganthum

big-head clover, large-head clover

few-flowered clover
Habit Pubescent perennial from a thick root and rhizomes, the stems erect, 1-3 dm. tall.
Leaves

Leaves with 5-9 leaflets, these rather thick, oblanceolate to obcordate, 1.5-2.5 cm. long;

stipules ovate-lanceolate, their margins lacerate.

Flowers

Heads mostly solitary and terminal, 3-5 cm. broad and long, the peduncles exceeding the leaves;

flowers 22-28 mm. long, pale pinkish to rose-pink, spreading to erect, the pedicels very short;

calyx 2/3 as long as the corolla, the 5 teeth awl-shaped, plumose, many times as long as the tube.

Fruits

Pod 1-seeded.

Trifolium macrocephalum

Trifolium oliganthum
Flowering time April-June April-June
Habitat Shrub-steppe, sagebrush desert and ponderosa pine woodlands. Balds, grasslands, and prairies at low elevations, often where dry and rocky.
Distribution
Occurring east of the Cascades crest in Washington; Washington, south through eastern Oregon, east to Idaho and Nevada.
[WildflowerSearch map]
[BONAP county map]
Occurring west of the Cascades crest in Washington; southwestern British Columbia to California.
[WildflowerSearch map]
[BONAP county map]
Origin Native Native
Conservation status Not of concern Not of concern
Sibling taxa
T. albopurpureum, T. arvense, T. aureum, T. bifidum, T. campestre, T. cernuum, T. ciliolatum, T. cyathiferum, T. depauperatum, T. dichotomum, T. douglasii, T. dubium, T. eriocephalum, T. fragiferum, T. glomeratum, T. gracilentum, T. hirtum, T. hybridum, T. incarnatum, T. latifolium, T. longipes, T. microcephalum, T. microdon, T. oliganthum, T. plumosum, T. pratense, T. repens, T. resupinatum, T. retusum, T. striatum, T. subterraneum, T. suffocatum, T. thompsonii, T. variegatum, T. vesiculosum, T. willdenovii, T. wormskioldii
T. albopurpureum, T. arvense, T. aureum, T. bifidum, T. campestre, T. cernuum, T. ciliolatum, T. cyathiferum, T. depauperatum, T. dichotomum, T. douglasii, T. dubium, T. eriocephalum, T. fragiferum, T. glomeratum, T. gracilentum, T. hirtum, T. hybridum, T. incarnatum, T. latifolium, T. longipes, T. macrocephalum, T. microcephalum, T. microdon, T. plumosum, T. pratense, T. repens, T. resupinatum, T. retusum, T. striatum, T. subterraneum, T. suffocatum, T. thompsonii, T. variegatum, T. vesiculosum, T. willdenovii, T. wormskioldii
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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