OregonFlora species comparison

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Calochortus lyallii

Calochortus umpquaensis
Calochortus lyallii
Calochortus umpquaensis

Umpqua mariposa lily
Stems

20–30 cm long, usually not branching.
Leaves

basal leaves narrowly lanceolate; to 40 cm long;

upper surface pubescent;

cauline leaf 1, not prominent.
Inflorescences

1–5-flowered;

bracts 2, subopposite, narrowly lanceolate.
Flowers

sepals lanceolate-acuminate; to 20 mm long;

petals to 40 mm long, white to cream-colored, with dark purple crescent above nectary;

inner surface hairy throughout or sparsely hairy;

upper inner surface minutely papillose or not;

filaments 7 mm long;

anthers to 7 mm long.
Fruits

nodding, 3–5.5 cm long.
Seeds

irregular-shaped, yellow.
2n

=20.

Calochortus lyallii

Calochortus umpquaensis
Distribution
[WildflowerSearch map]
[BONAP county map]
[WildflowerSearch map]
[BONAP county map]
Discussion

Southwestern Oregon. 3 subspecies.

Similar to C. howellii, this species is also a southwestern Oregon endemic found on serpentine soils. They differ in that C. umpquaensis has nodding fruits and petals up to 40 mm long, whereas C. howellii has erect fruits and shorter petals, to 25 mm long.
Source Flora of Oregon, volume 1, page 296
Frank Callahan
Sibling taxa
C. amabilis, C. bruneaunis, C. coeruleus, C. coxii, C. elegans, C. eurycarpus, C. greenei, C. howellii, C. indecorus, C. leichtlinii, C. longebarbatus, C. luteus, C. macrocarpus, C. monophyllus, C. nitidus, C. nudus, C. persistens, C. subalpinus, C. tolmiei, C. umpquaensis, C. uniflorus
C. amabilis, C. bruneaunis, C. coeruleus, C. coxii, C. elegans, C. eurycarpus, C. greenei, C. howellii, C. indecorus, C. leichtlinii, C. longebarbatus, C. luteus, C. macrocarpus, C. monophyllus, C. nitidus, C. nudus, C. persistens, C. subalpinus, C. tolmiei, C. uniflorus
Subordinate taxa
C. umpquaensis ssp. confertus, C. umpquaensis ssp. flavicomus, C. umpquaensis ssp. umpquaensis
Web links 
Unless otherwise noted, all data comes from OregonFlora.



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