The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

big deervetch, broad leaf lotus

rose flower lotus, rosy bird's-foot-trefoil, thicket trefoil

Habit Herbs 70–150 cm, villous or sparsely strigulose to glabrate; root-spreading. Herbs usually robust, 10–70 cm, puberulent to glabrate; root-spreading.
Stems

(1–)5–20+, ascending to erect, fleshy, stout, hollow.

1–10+, erect to decumbent, unbranched, sometimes branched, ± fleshy or not.

Leaves

stipules triangular or ovate to lanceolate, (2–)5–8 mm, membranous becoming scarious, often becoming inconspicuous; short-petiolate to petiolate;

rachis often curved, 6–12 cm;

leaflets (7–)9–15(–19), petiolulate, blades widely ovate to widely elliptic or widely obovate, (10–)20–30 mm, apex obtuse to emarginate, surfaces sparsely strigillose to glabrate.

stipules triangular to lanceolate, 2–6 mm, scarious;

petiolate;

rachis ± straight, 6–12 cm;

leaflets 9–15, petiolulate, blades elliptic or oblong to obovate, (5–)10–30 mm, apex obtuse to rounded, surfaces sparsely short-appressed hairy to glabrate or glabrous, or long-hairy to densely villous when glandular, pale green abaxially.

Peduncles

ascending, 3–8 cm, usually shorter than, rarely equaling, subtending leaf, elongating in fruit, glabrate or glabrous;

bract medial or absent, leaflets (1 or)3 or 5-foliolate.

ascending, 3.5–6.5 cm, equaling or longer than subtending leaf, little elongating in fruit, strigillose to glabrate;

bract medial or absent, 1–5-foliolate.

Umbels

8–20-flowered.

6–10(–12)-flowered.

Flowers

asymmetric, 12–16(–18) mm;

calyx green marked with purplish or pinkish, or purplish to pinkish, 4.5–8 mm, glabrous, tube cylindric, 4–6 mm, lobes deltate, 0.5–2 mm, sparsely ciliolate or eciliate;

corolla greenish or whitish becoming marked with red or purple, wings ± equaling keel, claw ± longer than calyx tube, banner implicate-ascending to 45°, keel apex acute.

symmetric, 10–15 mm;

calyx usually green, sometimes purple or purplish, 3–6 mm, glabrous, tube cylindric, 1.5–4.5 mm, lobes triangular to triangular-subulate, 0.5–2 mm, ciliolate;

corolla white to pinkish or rose, becoming red- or pink-striate or tipped, wings longer than keel, claw longer than calyx tube, banner implicate-ascending, keel apex acute.

Legumes

± ascending to inclined, reddish to brown, linear, turgid, (10–)35–70 × 3–5 mm, leathery, incompletely septate, glabrous.

± ascending to ± inclined, reddish brown, oblong, ± turgid, (15–)30–40 × 3–4 mm, leathery, not septate, glabrous.

Seeds

7–12, olive or reddish to dark brown, obovoid, 3–4 mm.

4–10, olive to reddish brown, ovoid, 3.5 mm.

2n

= 14.

Hosackia crassifolia

Hosackia rosea

Phenology Flowering late spring(–early summer).
Habitat Banks, stream­sides, burns, logged areas, coastal regions.
Elevation 0–1200 m. [0–3900 ft.]
Distribution
from USDA
w United States; nw Mexico
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; OR; WA
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 2 (2 in the flora).

Lotus crassifolius (Bentham) Greene [not Persoon] is an illegitimate name that pertains to Hosackia crassifolia.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Hosackia rosea is found in the coastal ranges of Washington (northern limit from Grays Harbor to Kitsap counties) and Oregon, through the North Coast Ranges into the South Coast Ranges in Santa Barbara County in California, and east along the Cascade Range of Oregon.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Herbs glabrate or sparsely strigulose; ovules.
var. crassifolia
1. Herbs villous; ovules 14–21.
var. otayensis
Source FNA vol. 11. FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Hosackia Fabaceae > subfam. Faboideae > Hosackia
Sibling taxa
H. alamosana, H. gracilis, H. incana, H. oblongifolia, H. pinnata, H. rosea, H. stipularis, H. yollabolliensis
H. alamosana, H. crassifolia, H. gracilis, H. incana, H. oblongifolia, H. pinnata, H. stipularis, H. yollabolliensis
Subordinate taxa
H. crassifolia var. crassifolia, H. crassifolia var. otayensis
Synonyms Lotus aboriginus, L. crassifolius var. subglaber, L. stipularis var. subglaber
Name authority Bentham: Trans. Linn. Soc. London 17: 365. (1836) Eastwood: Proc. Calif. Acad. Sci., ser. 2, 6: 424, plate 55. (1896)
Web links