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canyon pea, common Pacific pea, Pacific pea, Pacific peavine, Pacific vetchling, wild sweetpea

Tracy's pea, Tracy's sweet pea

Habit Herbs perennial, from rhizome, glabrous or sparsely to densely pubescent. Herbs perennial, from rhizome, glabrous or pubescent.
Stems

angled to narrowly winged, sprawling or climbing, basally branched 0–4 times, 2–20 dm.

angled, erect, sprawling, or climbing, often branched mid stem 1–4 times, 2–6 dm.

Leaves

4–14 cm;

tendrils well developed;

stipules lanceolate to linear, 5–25 × 1–10 mm, much smaller than leaflets (more than 1/4 width of distal leaflets);

leaflets 6–12, scattered, blades ovate to linear, 12–50 × 5–25 mm, surfaces glabrous or pubescent.

2–6 cm;

tendrils absent to well developed, 0–3 cm, usually not branched;

stipules linear, 5–15 × 1–5 mm, much smaller than leaflets;

leaflets 4–8, often paired, blades ovate, 15–30 × 5–20 mm, surfaces glabrous, or linear, 30–70 × 1–10 mm, surfaces glabrous or pubescent.

Inflorescences

5–20-flowered, 5–25 cm.

5–15-flowered, 2–7 cm.

Flowers

12–25 mm;

calyx lobes unequal, lateral lobes deltate, linear-triangular, or lanceolate and wider distal to base, shorter to longer than tube;

corolla cream-white, rose, lavender, blue-purple, or deep wine red, banner erect or reflexed toward calyx tube, blade equal to or longer than claw, wings equal to keel;

ovary glabrous or pubescent.

7–13 mm;

calyx lobes unequal, lateral lobes often linear-triangular, sometimes lanceolate, shorter than tube;

corolla white, banner erect, blade equal to claw, wings equal to keel;

ovary glabrous.

Legumes

40–60 × 4–7 mm.

40–60 × 4–7 mm.

2n

= 14.

Lathyrus vestitus

Lathyrus tracyi

Phenology Flowering Apr–Jun.
Habitat Roadsides, open coniferous and mixed evergreen forests.
Elevation 300–1300 m. (1000–4300 ft.)
Distribution
from USDA
w United States; nw Mexico
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
Discussion

Varieties 3 (3 in the flora).

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

Although W. L. Jepson (1909–1943, vol. 2) treated Lathyrus tracyi of northwestern California as a variety of L. bolanderi S. Watson (= L. vestitus), D. Isely (1992, 1998) considered L. tracyi a variety of L. lanszwertii. Lathyrus tracyi includes both ovate- and linear-leaflet forms. Linear-leaflet populations certainly suggest a relationship to L. lanszwertii, but ovate-leaflet forms, the presence of mid stem branching, and differences in floral structures suggest that L. tracyi may be better allied to L. holochlorus found to the north in the Willamette Valley of western Oregon and southwestern Washington. Lathyrus tracyi has been reported from Jackson County, Oregon, but specimens could not be examined.

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

Key
1. Flowers 16–25 mm, corollas dark wine red, ban­ners reflexed against calyx tube.
var. alefeldii
1. Flowers 12–17 mm, corollas cream-white, rose, lavender, or blue-purple, banners erect.
→ 2
2. Leaflet blades often sparsely to densely pubes­cent throughout, sometimes pubescent abax­ially, glabrous adaxially; flowers rose, lavender, or blue-purple; California, sw Oregon.
var. vestitus
2. Leaflet blades glabrous; flowers cream-white; Puget Sound area to sw Oregon and nw California.
var. ochropetalus
Source FNA vol. 11. FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Lathyrus Fabaceae > subfam. Faboideae > Lathyrus
Sibling taxa
L. angulatus, L. aphaca, L. biflorus, L. brachycalyx, L. brownii, L. cicera, L. decaphyllus, L. delnorticus, L. eucosmus, L. glandulosus, L. graminifolius, L. grimesii, L. hirsutus, L. hitchcockianus, L. holochlorus, L. japonicus, L. jepsonii, L. laetivirens, L. lanszwertii, L. latifolius, L. littoralis, L. nevadensis, L. nissolia, L. ochroleucus, L. odoratus, L. palustris, L. pauciflorus, L. polyphyllus, L. pratensis, L. pusillus, L. rigidus, L. sphaericus, L. splendens, L. sulphureus, L. sylvestris, L. tingitanus, L. torreyi, L. tracyi, L. tuberosus, L. venosus
L. angulatus, L. aphaca, L. biflorus, L. brachycalyx, L. brownii, L. cicera, L. decaphyllus, L. delnorticus, L. eucosmus, L. glandulosus, L. graminifolius, L. grimesii, L. hirsutus, L. hitchcockianus, L. holochlorus, L. japonicus, L. jepsonii, L. laetivirens, L. lanszwertii, L. latifolius, L. littoralis, L. nevadensis, L. nissolia, L. ochroleucus, L. odoratus, L. palustris, L. pauciflorus, L. polyphyllus, L. pratensis, L. pusillus, L. rigidus, L. sphaericus, L. splendens, L. sulphureus, L. sylvestris, L. tingitanus, L. torreyi, L. tuberosus, L. venosus, L. vestitus
Subordinate taxa
L. vestitus var. alefeldii, L. vestitus var. ochropetalus, L. vestitus var. vestitus
Synonyms L. bolanderi var. tracyi, L. lanszwertii var. tracyi
Name authority Nuttall in J. Torrey and A. Gray: Fl. N. Amer. 1: 276. (1838) Bradshaw: Bot. Gaz. 80: 245. (1925)
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