Flora of North America species comparison

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Calystegia silvatica

hedge bindweed, large bindweed, morning-glory, short-stalk false bindweed
Habit Perennials, rhizomatous.
Herbage

glabrous.
Stems

twining-climbing.
Leaves

blade ± cordate, to 50–120 mm, base rounded or lobed, lobes rounded or 1-pointed, basal sinus ± quadrate to rounded.
Bracts

immediately subtending sepals, lanceolate, to 30 × 15–35 mm, proximally saccate, margins strongly enfolding sepals, apex obtuse to truncate.
Flowers

sepals oval to ovate, 15–23 mm;

corolla white, sometimes pinkish-striped, rarely otherwise pink-tinged, 43–70[–88] mm;

stamens 23–40 mm;

anthers 4–6.5 mm.

Calystegia silvatica
Distribution
from USDA
North America; Europe; Asia; Pacific Islands (New Zealand); temperate regions
[WildflowerSearch map]
[BONAP county map]
Discussion

Subspecies 3 (2 in the flora).

Subspecies silvatica is native to eastern Mediterranean Europe; it has corollas (50–)55–75(–88) mm, stamens (25–)28–36(–39) mm, and bract apices emarginate to truncate.

Intermediates between Calystegia silvatica and C. sepium may be due to ancient or recent hybridization.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Key
1. Peduncles 1–2 per axil; anthers 4–5 mm.
subsp. fraterniflora
1. Peduncles 1 per axil; anthers 5–6.5 mm.
subsp. disjuncta
Source FNA vol. 14.
Parent taxa Convolvulaceae > Calystegia
Sibling taxa
C. atriplicifolia, C. catesbeiana, C. collina, C. felix, C. hederacea, C. longipes, C. macounii, C. macrostegia, C. malacophylla, C. occidentalis, C. peirsonii, C. pubescens, C. purpurata, C. sepium, C. soldanella, C. spithamaea, C. stebbinsii, C. subacaulis, C. vanzuukiae
Subordinate taxa
C. silvatica subsp. disjuncta, C. silvatica subsp. fraterniflora
Synonyms Convolvulus silvaticus
Name authority (Kitaibel) Grisebach: Spic. Fl. Rumel. 2: 74. (1844) — (as sylvatica)
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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