64 ILLINOIS BIOLOGICAL MONOGRAPHS [154 



stamens shorter than or about as long as the lobes; anthers oval, shorter 

 than the subulate filaments; ovary flask-shaped with a long somewhat 

 two-beaked neck; styles shorter than the ovary. Capsule globose, flask- 

 shaped, beaked, enveloped by the withered corolla; seeds light brown, 

 about 2.4 mm. long, varying from one to four in each capsule, slightly 

 rostrate, obovate or oblong, oblique; hilum oblique or transverse, the 

 umbilical area slightly striated. 



Type locality: Little Craggy Mountains, N. Carolina. Range: In 

 the Alleghany Mountains from Virginia to South Carolina. 



Specimens examined: United States: W. Virginia (Gray & Sullivant in 1853), 

 White Sulphur Springs (Steele in 1906). N. Carolina (Rugel, without number or date, 

 perhaps the same as the type collection, Curtis in 1845, Canby in 1880, Ashe), Waynesville 

 (Stanley 5372, Canby in 1876), Balsam Mts. (Ball in 1890, Canby in 1876), Mt. Mitchell 

 (Biltmore Herb. 5727), Transylvania Co. (Biltmore Herb. 5727a), Buncombe Co. (Biltmore 

 Herb. 5727b), Roan Mt. (Canby in 1884, Chickering in 1877 and in 1880, Cannon 172, Ashe), 

 Biltmore (Mohr in 1899), Little Craggy Mts. (Rugel in 1841, the type, in the Engelmann 

 Herb.), Grandfather Mt. to Linville (Hitchcock in 1905), Swain Co. (Beardsley & Kofoid in 

 1891). S. Carolina (Buckley in 1842). Tennessee; Cocke Co. (Kearney 842), Gattingsberg 

 (Canby in 1888). 



Cuscuta gronovii Willdenow 



C. gronovii Willdenow in Roemer & Schultes Syst., 6:205, 1820. — Choisy Mem. Soc. Phys. 

 et Hist. Nat. Geneve, 9:281, pi. 4, fig. 3, 1841; and in DC, Prodromus, 9:459, 1845 — 

 Engelmann, Trans. Acad. Sci. St. Louis, 1:507, 1859.— Matthew, Bull. Torr. Bot. Club, 

 20, pi. 165, fig. 9, 1893.— Britton & Brown, Illustr. Flora, 3:30, fig. 2963, 1898; 2 ed., 

 3:51, fig. 3449, 1913.— Stevens, Amer. Journ. Bot., 3:185, figs. 7-8, 1916. 



Epithymum gronovii (Willdenow) Nieuwland & Lunell, Amer. Mid. Nat., 4:511, 1916. 



Stems medium to coarse. Flowers glabrous, about 2-4 mm. long, 

 pentamerous, on pedicels as long as or longer than the flowers, in loose or 

 dense panicled cymes; calyx lobes broad, ovate, orbicular or oblong, obtuse, 

 overlapping, shorter than or equalling the corolla tube, sometimes some- 

 what serrated; corolla campanulate, its lobes as long as or shorter than the 

 tube, obtuse, spreading; scales variable, shorter than the tube or equalling 

 it, ovate or oblong, infrequently more or less truncated or divided, deeply 

 fringed with longer processes towards the apex and shorter ones towards 

 the base and frequently on the bridge which is below the middle; stamens 

 nearly as long as the lobes; filaments longer than the oval anthers; styles 

 shorter than the globose, conical ovary. Capsule globose-conic, umbonate, 

 enveloped by the corolla or infrequently bearing this about its apex; seeds 

 about 1.5 mm. long, two to four in a capsule, compressed, obliquely ovate, 

 slightly rostrate, brown; hilum linear, oblique or transverse. 



The specimens of this species show great variation in the size of flowers 

 and shape of parts. 



Key to the varieties 

 Corolla ordinarily surrounding (not capping) the capsule. 



Calyx lobes about as long as the shallowly campanulate corolla latiflora 



Calyx lobes usually shorter than the more cylindrical corolla vulgivaga 



Corolla capping the capsule calyptrata 



