668 coNV<>LvrLArKAi-: (cuNvoLvrij-s FAMILY) 



masses 5 pairs, horizontal. Follicles turgid, mostly murica.tr with suit warty 

 projections, sometimes ribbed. Seed with a coma. Herbs or shrubs with 

 opposite heart-shaped leaves and corymbose-umbeled greenish or dark purple 

 flowers on peduncles rising from between the petioles. Our species belong 

 to the typical section, with the crown simple and unappendaged, and the corolla 

 nearly veinless. (Name from vincere, to conquer, and to-simm, poison, applied 

 originally to species of the preceding genus in allusion to supposed curative 

 properties.) GONOLOBUS Michx., in part. 



* Crown alow undulately W-lobed fleshy disk ; follicles unarmed, (jlabrous, 3-f>- 



costate or -angled. 



1. V. suberbsum (L.) Britton. Leaves cordate with an open shallow or 

 sometimes deeper and narrow sinus, pointed, glabrate or hairy, 0-14 cm. long; 

 umbels 3-9-flowered, much shorter than the petiole ; corolla broadly conical in 

 bud, abruptly pointed, twisted; lobes ovate or triangular-lanceolate, acute, pubes- 

 cent inside; calyx half as long. (Gonolobus R. Br.) Near the coast, Va. to 

 Fla. June-Aug. 



2. V. gonocarpos Walt. Leaves cordate with a deep and narrow often closed 

 sinus, conspicuously acuminate, 0.5-1.5 dm. long, finely pubescent beneath; 

 umbels 5-10-flowered, barely equaling the petiole ; corolla cl<>n<i<it<>d-c<nn<-<rf in 

 bud, not twisted; lobes narrowly lanceolate, obtuse, glabrous inside, 3-4 </////-* 

 as long as the calyx. (Gonolobus laevis Man. ed. 6, not Michx.) River-banks, 

 Va. to s. Ind., Mo., S. C., and Tex. June, July. 



* * Crown cup-shaped, as high as the anthers ; follicles muricate, not costate. 

 H- Crown fleshy, merely IQ-crenate, or the crenatures bidentate. 



3. V. obliquum (Jacq.) Britton. Leaves rounded- to ovate-cordate with a 

 narrow sinus, abruptly acuminate, 0.7-2.5 dm. long; umbel many-flowered; 

 corolla in bud conical, its lobes linear-ligulate, 1-1.5 cm. long, 2 mm. wide, 

 crimson-purple inside, dull or greenish and minutely pubescent outside. (Gono- 

 lobus R. Br.) River-banks, Fa. and Va. to (). and Mo. June, July. 



4. V. hirsutum (Michx.) Britton. Commonly more hairy ; leaves with the 

 basal lobes sometimes overlapping; peduncles fewer-flowered; corolla in lixl 

 ovoid, its lobes elliptical-oblong, rarely 1 cm. long, barely puberulent outsi'h-. 

 brownish-purple to yellowish. (Gonolobus Michx.) Md. and Va. to Tenn. 

 and Fla. May-Aug. 



H- -t- Crown thinner, the border lobed or toothed; leaves as in th< j prm-tH,/*/. 



5. V. Sh6rtii (Gray) Britton. Resembles no. 3, but larger-leaved ; corolla 

 conical in bud, dark crimson-purple, its lobes ligulate, 1.5 cm. long ; crown <ih<>nt 

 IQ-toothed, the alternate teeth thinner, narrower and longer, either emrnin<n<' 

 or 2-parted. (Gonolobus Gray.) Ky., and southw. 



6. V. carolinSnse (Jacq.) Britton. Flower-bud elongate-ovoid ; corolla 

 brown ish-purple, its lobes oblong or linear-oblong, rarely 1 cm. long : /"// 

 uinlidately and very obtusely 5-lobed, with a longer bifid subnint,- y/v/v.s-N /// //// 

 sinus. (Gonolobnx R. Br.) Va. to Mo., and southw. May-July. 



7. V. Baldwinianum (Sweet) Britton. Corolla whiiish, with spivuding 

 oblong or spatulate lobes (at most 1 cm. long) ; crown <!<<< jily cleft intn " usually 

 emanjiii'iti' /"/"* Imlf n* I<KJ as the pair of subnlah processes /// ''"<// sin us. 

 (Gonolobus Sweet.) Ga. to Mo. and Ark. May, .June. 



CONVOLVULACEAE (CONVOLVULUS FAMILY) 



Chiefly twining or trailing herbs, often with some milky juice, witJi <i1t*-niate 

 leaves (or scales) and regular b-androus flowers ; a calyx of 5 imbrirntnl *> />/* ; 

 a b-plaited or b-lobed corolla convolute or tn-i*tl in th< l>m! , imbricate in no. 6); 

 a 2(rarely ^-celled nrnry (< in <m>' tribe ~2 mpHWU /'.-<ti!s}, n-ith n pair of 

 erect <tvu!rs in < >-h <</!. tin- citltt siinicfimi's <lti!>/<'tl t>;/ ,i t'titxr partition f>'(n-'< >/ 

 \-<-<'l/l ; flu iinhryo large, <-urrl <>, rui/nl in 



