218 CONVOLVULACE^. Evolvulus. 



an incli long, eqiialleil by tlie almost glabrous filaments and the moderately 2-c'left style. 

 — Convolvulus Pickeringii, Torr. ; M. A. Curtis in Bost. Jour. Nat. Hist. 1.129; Gray, Man. 

 ed. 1, 349. Stijlisma evolvuloides, var. angusU folia, Choisy in DC. 1. c. S. Pickerinrjli, Gray, 

 Man. ed. 2, 335; Chapm. I.e. Bonumia Pickeringii, Gray, Man. ed. 5,376. — Dry pine 

 barrens and prairies, New Jersey to North Carolina; Louisiana and Texas; also W. 

 Illinois, H. N. Patterson. 



6. EVOLVULUS, L. (From evolco, I unroll, the name a counterpart of 

 Convolvuhis.) — Low and small herbaceous or suft'rutescent plants (of the warm 

 parts of the world, largely American) ; with erect or commonly diffuse or pros- 

 trate stems, not twining, entire leaves, one-few-Howered and sometimes paniculate 

 peduncles, and small flowers, produced in summer and autumn. Corolla in ours 

 almost rotate, white, rose-colored, or blue. 



E. MuHLENBERGii, Spreng. Pugill. i. 27, habitat not given, is something not identified, and 

 by "peduncles opposite the leaves" not of this order. 



* Peduncles liliforui, 1-3-flowered, mostly longer than the leaves: either perennials or annuals ? 

 E. alsinoides, L. Villous or -hirsute, commonly with some long and spreading hairs: 



stems slender, diffuse or decumbent, a foot or two long : leaves from oval or oblong to 

 lanceolate, somewhat petioled : pedicels at length nodding or refracted on the peduncle : 

 corolla about 3 lines broad. — (Founded on the Asiatic plant, Burm. Zeyl. ii t. 6, fig. 1, & 

 t. 9, fig. 1, and Kheede, Malab. xi. t. 64, apparently also indigenous to the New World, 

 and diverse.) E. alsinoides, var. hirticaulis, Torr. Bot. Mex. Bound. 150. E. dij/^tsiis, Chapra. 

 Fl. 345. — S. Florida and Texas, Blodgett, Berlandier, Wriijht, &c. (All trop. regions ?) 



E. linifolius, L. Too like narrow-leaved and slender forms of the preceding, but the fine 

 sericeous pilbescence all appressed : leaves small and linear-lanceolate, nearly sessile : blue 

 corolla only 2 or 3 lines in diameter. — Spec. ed. 2, i 392, founded on Convolvulus lierhaceus, 

 erectus, &c., P. Browne, Jam. 152, t. 10, fig. 2, not Choisy in DC. — S. Arizona, near Tucson, 

 Greene. (Mex., W. Ind., &c.) 



E. Arizonicus. Minutely sericeous or cinereous with fine appressed pubescence, pani- 

 culately branched : stems very slender, erect and diffuse or decumbent-spreading : leaves 

 lanceolate or linear-lanceolate, subsessile or short-petioled (G to 12 lines long, 2 or 3 wide) ; 

 the upper reduced to bracts so tliat the inflorescence becomes paniculate: peduncles mostly 

 1-flowered : sepals ovate-lanceolate, acute : corolla blue or bluish, half inch in diameter 

 when expanded. — E. alsinoides, Torr. 1. c, partly. E. hohsericeus, var. ohtusatns, Torr. 1. c, 

 partly, excl. syn. — Sandy or dry prairies, Arizona and New Mexico ; a common species 

 of the region. (Adjacen.t Mex.) 



E. mucronatus, Swartz. Glabrate and green, or when young sparsely villous-seri- 

 ceous with appressed pubescence : stems decumbent or prostrate : leaves thickish, oval or 

 round-obovate (about half inch long), short-petioled, the obtuse or retuse apex mucronate : 

 peduncles barely surpassing or some shorter than the leaves : corolla pale blue or white, 

 4 lines in diameter. — Griseb. Fl. W. Ind. 475; Meissn. I.e. 345. E. ghdiriusculus, Choisy, 

 Conv. 156, & in DC. 1. c. 448 ; Chapm. 1. c. — South Florida, Blodgett. Perhaps E. nunimu- 

 lariiis, Nutt. Gen. i. 174 (not L.), on the Mississippi below New Orleans. (Trop. Amer.) 



# * Peduncles or rather pedicels (biliracteolate at base, solitary and one-flowered) short, usually 

 very short; the lower sometimes half the length of the leaf, recurved in fruit: very low peren- 

 nials. 



•i— Upper surface of the leaves green and glabrous, otherwise sericeous : corolla white or pale 

 blue. 



E. sericeus, Swartz. Stems slender or filiform, a span or two high : leaves subsessile, 

 lanceolate or linear-lanceolate (6 to 10 lines long), erect or ascending, mucronate-acuminate 

 or acute ; silky pubescence fine and close-pressed, sometimes short, whitish or fulvous : 

 sepals ovate-lanceolate : corolla 3 or 4 lines in diameter. — Prodr. 5-5, & Fl. Ind. Occ. i. 576 ; 

 Nutt. Gen. i. 174 ; Chapm. 1. c. ; Choisy, 1. c. ; Meissn. in Fl. Bras. vii. 3.53. Convolvidus 

 erectus, herbaceus, &c., P. Browne, .Jam. 153, t. 10, fig. 3. E. hohsericeus, Torr. 1. c. partly, 

 not HBK. — Pine woods, &c., Florida to Louisiana, Texas, and Arizona. The western 

 forms with looser and longer hairiness. (Mex., W. Ind., S. Amer.) 



