876 CONVOLVULACE^, (CONVOLVULUS FAMTLT.) 



eluded. Style 1 : stigmas 2, linear or oblong. Pod imperfeetly 2-celled or 1- 

 celled, 4-seeded. — Perennials, with' heart-shaped or arrow-shaped leaves^ and 

 axillary 1-flowered peduncles; fl. in s\imnier. (Name from koXv^, calyx, and 

 areya, to cover, alluding t» the bracts enclosing the calyx.) 



1. C. S^pium, R.Br. (Hedge Bindweed.) Stem tunning or sometimes 

 trailing extensively; leaves triangular-halberd-shaped or arrow-shaped, acute or 

 pointed, the lobes at the base obliquely truncate and often somewhat toothed 

 or sinuate-lobed ; peduncles 4-angled ; corolla white, or in the American plant 

 more commonly light rose-color ( 1 J' - 2' long) : the typical form glabrous through- 

 out. (Convolvulus sepium, and C. repens, L.) — Varies greatly, often slightly 

 pubescent : Var. puuescens is a downy form, in the young state approaching 

 the next. ( C. Catesbyana, Pursh. ) — Common, especially along the moist banks 

 of streams. (Eu.) 



2. C. spithamsea, Pursh. Downy; stem low and mostly simple, uprig/ii or 

 ascending (6' -12' long) ; leaves oblong, with or without a heart-shaped or auri- 

 cled base ; corolla white (2' long) . — Dry, mostly sandy ground : not rare. 



5. BONAMIA, Thouars. (Breweria, R. Br. & Stylisma, Raf. ) 



Styles 2, or rarely 3, simple and distinct, or else united into one below : stig- 

 mas depressed-capitate. Otherwise as Convolvulus and Evolvulus. — Perennial 

 prostrate or diffusely spreading herbs (or in warmer regions sometimes shrubby) ; 

 flowers small ; in summer : corolla more or less hairy or silky outside. ( Named 

 for Francis Bonamy, author of a Flora of Nantes.) 



1. B. humistr^ta, Gray. (Proceed. Amer. Acad. 5, p. 337.) Sparsely 

 hairy or nearly smooth ; leaves varying from oblong with a somewhat heart- 

 shaped base to linear, mucronate ; peduncles 1 - 7-flowered ; bracts shorter than 

 the pedicels ; sepals pointed, glabrous or nearly so ; corolla white ; Jilaments hairy ; 

 styles united at the base. (Convolvulus humistratus, Walt., who well distinguishes 

 this from the next. Stylisma evolvuloides, Chois., in part. S. humistrata, 

 Chapm.) — Dry pine barrens, Virginia (probably rwt in Ohio), and southward, 



2. B. aqiiatica, Gray. Minutely soft-downy and somewhat hoary ; sepals 

 silky ; corolla pink or purple ; filaments smooth ; styles separate almost to the base : 

 otherwise nearly as in the last. (Conv. aquaticus, Walt. Stylisma aquatica, 

 Chapm.) — Margin of ponds, S. Virginia? and southward. 



3. B. Pickeringii, Gray. Soft-pubescent or smoothish ; leaves very nar- 

 rowly linear or the lowest linear-spatulate, tapering to the base, nearly sessile ; pe- 

 duncles 1 - 3-flowered ; bracts resembling the leaves, mostly exceeding the flowers ; 

 sepals hairy: filaments (scarcely hairy) and styles (which are united far above the 

 middle) exserted from the open white corolla. (Stylisma Pickeringii, Ed. 2.) — 

 Eather dry sandy pine-barrens. New Jersey and southward. — Stems l°-3° 

 long: leaves I'-l J' long. Corolla 4" - 5" broad. 



6. EVOLVULUS, L. Evolvulus. 



Calyx of 5 sepals, naked at the base. Corolla open funnel-form or almost 

 wheel-shaped. Styles 2, each 2-cleft : stigmas obtuse. Pod 2-cclled ; the cells 



