94 Introduction to Botany. 



z. Convolvulus rSpens, L. (L., refens, trailing.) TRAILING BINDWEED. 

 I to 3 feet long, trailing or twining, pubescent or tomentose. Leaves sagittate with 

 basal lobes obtuse or rounded, sometimes cordate. Peduncles i-flowered. Flowers 

 white. Stigmas oblong. Calyx 2-bracted. In dry fields. 



3. Convolvulus spithamaeus, L. Upright Bindweed. Erect or ascending, 

 6 to 12 inches high, somewhat pubescent. Leaves mostly oblong-oval and short- 

 pelioled. Flowers white, solitary on long peduncles. Calyx subtended by 2 large 

 oval bracts. Stigmas thick, oblong. In dry, sandy, or rocky soil. 



4. Convolvulus arvensis, L. (L., arvensis, belonging to the fields.) Small 

 Bindweed. Stems slender, trailing or decumbent, i to 25 feet long, nearly or 

 quite glabrous. Leaves sagittate at the base and somewhat acute at the apex. 

 Peduncles 1-4-flowered, but commonly 2-flowered. Corolla short-funnel-form, 

 white or pink. Peduncles, and usually the pedicels, bracted. Calyx not bracted. 

 Stigmas linear. In fields and waste places. 



POLEMONIACEjE. Phlox Family. 



Herbs. Flowers in corymbose or paniculate clusters, perfect and 

 mostly regular. Calyx 5-cleft, tubular or campanulate. Corolla 5-lobed, 

 tubular, campanulate, or rotate. Stamens 5, inserted on the tube of the 

 corolla and alternate with its lobes. Ovary superior, 3-celled ; style 

 3-lobed. Capsule few- to many-seeded, 3-valved. ' 



I. PHLOX. 



(Gt., phlox, flame, an ancient name for Lychnis.) 



Perennial or annual herbs, with opposite, entire leaves, and flowers 

 borne in cymose, mostly bracted, clusters. Calyx tubular or tubular- 

 campanulate, becoming distended and rupturing by the ripening capsule. 

 Corolla salver-form with broad, spreading lobes. Stamens included, 

 inserted at different heights on the corolla tube. Ovules 1-4 in each 

 of the 3 cavities of the ovary. 



1. Phlox maculata, L. (L., maculatus, stained or spotted.) Wild Sweet 

 William. Stems erect, i^ to 5 feet high. Sometimes puberulent, and often 

 flecked with purple. Leaves, excepting the uppermost, opposite, ovate to ovate- 

 lanceolate, 2 to 5 inches long. Flowers short-pediceled, borne in elongated, leafy 

 panicles. Calyx teeth lanceolate. Flowers mostly pink or purple. 



2. Phlox glaberrima, L. (h,.,glaberrimus,ve):y smooth.) SMOOTH PHLOX. 

 Stems I to 3 feet high, smooth and slender. Leaves linear-lanceolate, or linear 

 below, I5 to 4 inches long. Flowers in cymes grouped in a corymbose cluster. 

 Calyx teeth lanceolate-awl-shaped. Corolla* mostly pink, with obovate lobes 

 longer than the tube. Prairies and open woods. 



3. Phlox pildsa, L. {'L.,filosns, downy.) Downy Phlox. Stems slender, 

 I to 2 feet high. Plant downy or hairy, sometimes glandular. Leaves i to 4 inches 



