376 CONVOLVULACEJE. (CONVOLVULUS FAMILY.) 



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

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

 axillary 1-flowered peduncles; fl. in summer. (Name from KciXi/, calyx, and 

 a-Teyo), to cover, alluding to the bracts enclosing the calyx.) 



1. C. sepium, R. Br. (HEDGE BINDWEED.) Stem twining 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 ( l' - 2' long) : the typical form glabrous through- 

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



^ pubescent : Var. PDBESCENS 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,, upright 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 ; JUaments 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 not in Ohio), and southward. 



2. B. aquatica, 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.) 

 Rather dry sandy pine-barrens, New Jersey and southward. Stems l-3 

 long : leaves 1 ' - 1 ' 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-celled ; the cells 



