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coastal dunes milk vetch, titus' milkvetch

Habit Herbs annual, biennial, or perennial, caulescent; caudex superficial.
Stems

1–3, (2–)3–12 cm.

single or few to many.

Leaves

2–7 cm;

leaflets 7–11(or 13).

odd-pinnate, petiolate to subsessile;

leaflets (3 or)5–25(or 27).

Racemes

2–7-flowered.

subumbellate or loosely flowered, flowers ascending, spreading, or declined.

Flowers

5–6 mm;

calyx 2.7–3.5 mm.

Corollas

usually pink-purple, purple or purple-tinged or -tipped, ochroleucous, or lilac, rarely whitish, banner recurved through 20–80°, keel apex acute, round, deltate, or triangular-acuminate, sometimes slightly beaklike.

Calyx

tubes campanulate.

Legumes

straight or slightly decurved, base round, (6–)7–14 mm, pubescent;

stipe 0 mm.

deciduous, usually sessile, rarely short-stipitate, short gynophore sometimes present, ascending, spreading to declined, incurved-ascending, or pendulous, mostly linear to linear-oblanceoloid, oblong, or crescentic, sometimes 3-sided, rarely ellipsoid or fleshy, straight or incurved, rarely slightly decurved, compressed laterally, slightly 3-sided or subterete, bilocular.

Seeds

5–11.

(2–)4–30.

Hairs

basifixed or malpighian.

Stipules

distinct.

2n

= 22.

Astragalus tener var. titi

Astragalus sect. Leptocarpi

Phenology Flowering late Mar–May.
Habitat Moist depressions on coastal bluffs and dunes.
Elevation 0–20 m. (0–100 ft.)
Distribution
from FNA
CA
[BONAP county map]
w United States; se United States; n Mexico
Discussion

The coastal var. titi once occurred in Los Angeles, Monterey, and San Diego counties. It was thought extinct, but one population was discovered on a bluff in Monterey County.

Variety titi is in the Center for Plant Conservation’s National Collection of Endangered Plants.

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

Species 24 (18 in the flora).

Section Leptocarpi is complex morphologically, with eight subsections recognized, one of them, subsect. Coahuilani Barneby, occurring only in northern Mexico. The subsections within the flora area are: subsect. Pringleani Barneby (Astragalus nothoxys); subsect. Arizonici Barneby (A. arizonicus); subsect. Mohavenses Barneby (A. albens, A. mohavensis); subsect. Parvi Barneby (A. hypoxylus); subsect. Tricarinati (Rydberg) Barneby (A. bernardinus, A. tricarinatus); subsect. Californici (A. Gray) Barneby (A. acutirostris, A. breweri, A. claranus, A. emoryanus, A. pauperculus, A. rattanii, A. tener); and subsect. Leptocarpi (M. E. Jones) Barneby (A. leptocarpus, A. lindheimeri, A. nuttallianus, A. nyensis).

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

Source FNA vol. 11. FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Astragalus > sect. Leptocarpi > Astragalus tener Fabaceae > subfam. Faboideae > Astragalus
Sibling taxa
A. tener var. ferrisiae, A. tener var. tener
Subordinate taxa
Synonyms A. titi
Name authority (Eastwood) Barneby: Aliso 2: 209. (1950) M. E. Jones: Rev. N.-Amer. Astragalus, 266. (1923)
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