Flora of North America species comparison

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Evolvulus sericeus

Evolvulus

silky evolvulus, silver dwarf morning-glory

dwarf morning-glory
Habit Perennials or subshrubs; herbage hairy, hairs appressed to ± spreading. Annuals, perennials, or subshrubs.
Stems

ascending or procumbent, 10–30 cm.

ascending, decumbent, erect, procumbent, or prostrate, glabrous, glabrate, or hairy.
Leaves

distichous, distals ± spreading;

blade elliptic, lanceolate, oblong, or ovate, 4–25 × 2–10 mm, surfaces: abaxial densely hairy, adaxial sparsely hairy or glabrate.

sessile or subsessile;

blade elliptic, lanceolate, linear, oblanceolate, oblong, orbiculate, or ovate, 2–35 mm, surfaces glabrate, glabrous, or hairy.
Inflorescences

flowers solitary;

peduncles plus pedicels stout, 0–2(–4) mm.

2 or 3+-flowered cymes or flowers solitary.
Flowers

sepals oblong to lanceolate, 3–5 mm;

corolla pale blue, violet, or white, rotate to broadly funnelform, limb 7–12 mm diam. 2n = 26 (Argentina).

sepals lance-linear, lanceolate, lanceolate-ovate, oblong, or ovate, 2–6 mm;

corolla usually blue, lavender, purple, or white, rarely violet, campanulate, funnelform, or rotate, 3–15+ mm, limb 5-angled or -lobed to subentire, 5–12(–22) mm diam.;

styles 2, distinct or basally connate, each 2-fid 1/2+ length;

stigma lobes 4, filiform to subclavate.
Fruits

capsular, globose to ovoid, dehiscence circumscissle or valvate.
Seeds

1–4, complanate to ± globose, glabrous, surfaces smooth or verrucose.
x

= 13.

Evolvulus sericeus

Evolvulus
Phenology Flowering Apr–Oct.
Habitat Oak woodlands, desert grass­lands, plains, savannas, pinelands, chaparral.
Elevation 0–1900 m. (0–6200 ft.)
Distribution
from FNA
AR; AZ; FL; GA; LA; NM; TN; TX; Mexico; Central America; South America; West Indies
[WildflowerSearch map]
[BONAP county map]
from USDA
North America; Mexico; Central America; South America; West Indies [Introduced in Europe, Africa, Asia, Australia]
[BONAP county map]
Discussion

Species ca. 100 (7 in the flora).

A record of Evolvulus nummularius (Linnaeus) Linnaeus for Florida is based on Rugel 108 (US), which is probably from Cuba (D. B. Ward 1968b).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Key
1. Peduncles plus pedicels filiform, (8–)12–50+ mm.
→ 2
2. Herbage glabrous or sparsely hairy and glabrescent, hairs appressed; stems usually procumbent or prostrate, sometimes decumbent.
E. convolvuloides
2. Herbage usually hairy, hairs ± appressed to spreading, sometimes tomentose; stems usually ascending, decumbent, or erect, rarely procumbent.
→ 3
3. Leaf blades lanceolate, lance-linear, or linear; sepals lanceolate to lance-linear, 3–3.5 mm, abaxially pilose to tomentose; corolla limbs (10–)12–22 mm diam.
E. arizonicus
3. Leaf blades elliptic, lanceolate, oblong, or ovate; sepals lanceolate, 2–2.5 mm, abaxially glabrous or pilose; corolla limbs (5–)7–10 mm diam.
E. alsinoides
1. Peduncles plus pedicels stout, 0–2(–5+) mm.
→ 4
4. Leaves distichous.
→ 5
5. Stems decumbent to prostrate; leaf blades usually ovate to broadly ovate, sometimes suborbiculate, 5–8(–10) × 4–7 mm.
E. grisebachii
5. Stems ascending or procumbent; leaf blades elliptic, lanceolate, oblong, or ovate, 4–25 × 2–10 mm.
E. sericeus
4. Leaves pentastichous.
→ 6
6. Internodes usually 4+ mm; leaf blades elliptic to linear; outer sepals ovate, 3–4 mm; rhizomatous perennial.
E. arenarius
6. Internodes rarely 4+ mm; leaf blades usually elliptic, sometimes linear-oblong or narrowly lanceolate to oblanceolate, rarely oblong; outer sepals lanceolate to narrowly lanceolate, 4–5 mm; subshrub.
E. nuttallianus
Source FNA vol. 14. FNA vol. 14. Author: Daniel F. Austin†.
Parent taxa Convolvulaceae > Evolvulus Convolvulaceae
Sibling taxa
E. alsinoides, E. arenarius, E. arizonicus, E. convolvuloides, E. grisebachii, E. nuttallianus
Subordinate taxa
E. alsinoides, E. arenarius, E. arizonicus, E. convolvuloides, E. grisebachii, E. nuttallianus, E. sericeus
Synonyms E. macilentus
Name authority Swartz: Prodr., 55. (1788) Linnaeus: Sp. Pl. ed. 2, 1: 391. (1762)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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