372 CONVOLVULACE^. "(CONVOLVULUS FAMILY.) 



corolla ovate-lanceolate, minutely crenulate, spreading ; scales large, deeply 

 fringed ; capsule enveloped bij remains of corolla. (C. indecora, Choisy.) — Yar. 

 PULCHERRI3IA, Engelm. The larger form, with coarser stems, and conspicu- 

 ous flowers \^-2^" long and wide ; anthers and stigmas yellow or deep purple. 



— ^Yet prairies, on herbs and low shrubs (principally Leguminosae and Com- 

 positae), from 111. to Fla. and Tex., and westward. 



5. C. inllexa, Engelm. Similar to the preceding ; flowers of the same 

 structure, but smaller (only V long), generally 4-merous; coi-olla deeper, with 

 erect lobes, finally capping the capsule ; scales reduced to a few teeth. — Open 

 woods and dry prairies, on shrubs (hazels, etc.) or coarse herbs, southern N. 

 Eng. to Xeb. and Ark. 



•*- -t- Corolla-lobes obtuse, spreading. 



6. C. Gronovii, Willd. Stems coarse, often climbing high; corolla- 

 lobes mostly shorter than the deeply campanulate tube; scales copiously 

 fringed ; capsule globose, umbonate. — Wet shady places, Canada to Minn., 

 south to Fla. and Tex. The commonest of our species. Flowers very variable 

 in size and compactness of clusters. — Var. latifl6ra, Engelm., is a form 

 with flowers of more delicate texture, and shorter tube and longer lobes to 

 the corolla. Common northward. 



7. C. rostrata, Shuttleworth. Similar to the preceding ; flowers larger 

 (2 -3" long), more delicate and Avhiter; lobes of corolla and calyx shorter 

 than its tube; slender styles longer; ovary bottle-shaped ; capsule long-pointed. 



— Shady valleys in the Alleghanies, from Md. and Va., southward ; on tall 

 herbs, rarely shrubs. 



* * * Sepals 5, distinct, surrounded by 2 or more similar bracts ; styles capil- 

 lary ; scales large, deeply fringed ; capsule capped by the marcescent corolla. 



8. C. Ctispidkta, Engelm. Stems slender ; flowers (H- 2^" hmg) thin, 

 on bracteolate pedicels in loose panicles ; the ovate-orbicular bracts and sepals 

 and the oblong corolla-lobes cuspidate or mucronate, rarely obtuse, shorter 

 than the cylindrical tube ; styles many times longer than the ovary, at length 

 exserted. — Wet or dry prairies, on Ambrosia, Iva, some Leguminosae, etc., 

 Neb. to Tex., occasionally down the Missouri as far as St. Louis. 



9. C. COmpacta, Juss. Stems coarse ; flowers closely sessile in densely 

 compact clusters; bracts (3-5) and sepals orbicular, concave, slightly crenate, 

 appressed, nearly equalling or much shorter than the cylindrical tube of the 

 Yorolla ; stamens shorter than the oblong obtuse spreading lobes of the latter. 

 '— Along the west side of the Alleghanies from Ont. to Ala., west to Mo. and 

 Tex. In damp woods, almost always on shrubs. 



10. C. glomerata, Choisy. Flowers very densely clustered, forming 

 knotty masses closely encircling the stem of the foster plant, much imbricated 

 with scarious oblong bracts, their tips recurved-spread ing , sepals nearly similar, 

 shorter than the oblong-cylindrical tube of the corolla ; stamens nearly as long 

 as the oblong-lanceolate obtuse spreading or reflexed corolla-lobes ; style seve- 

 ral times longer than the ovary. — Wet prairies, Ohio to Minn., Kan., and 

 Tex., mostly on tall Compositce. The rope-like twists (^-f thick), of white 

 flowers with golden yellow anthers imbedded in a mass of curly bracts, have 

 a singular appearance. 



