PENNELL: THE SPECIES OF KNEIFFIA 371 
Knetffia ‘aiid Spach, /. c. 375. 1835. ‘‘Oenothera serotina 
Sweet. : 
Oenothera fruticosa phyllopus ass Bot. Mag. 64: sub $l. 3545. 
037. |. Bot, Magi t, 332. 
Oenothera fruticosa incana Hook. I. c. sub pl. 3545. 1837. 
Oenothera fruticosa hirsuta Nutt.; T. & G., Fl. N. Am. 1: 496. 
1840. 
Oenothera hybrida ambigua Blake, Rhodora 20: 52. 1918. 
Dry soil, barrens, etc., New York to Alabama, Tennessee and 
southern Michigan; the commonest Kneiffia of the Piedmont and 
Alleghanian floras. 
10a. Kneiffia tetragona longistipata Pennell, var. nov. 
Leaves linear-lanceolate. Stipe equaling capsule-body. 
Type, woods near Clemson, Pickens County, South Carolina, 
collected in flower May 12, 1907, H. D. House 3340; in the 
herbarium of the New York Botanical Garden. 
Piedmont Region, North Carolina to Georgia. 
10b. Kneiffia tetragona hybrida (Michx.) Pennell, comb. nov. 
Oenothera hybrida Michx. Fl. Bor. Amer. 1: 225. 1803. ‘Hab. 
in Carolina superiore.”’ 
Kneiffia floribunda Spach, Hist. Veg. 4: 376. 1835. “Croit dans 
le midi des Etats-Unis.” 
Mountains of North Carolina, there nearly or quite replacing 
the typical form of the species. As examples may be cited: 
Biltmore Herb. 669b; Heller 263; and Standley 5366. 
: 11. Kwnetrr1a GLAUCA (Michx.) Spach 
Oenothera glauca Michx. Fl. Bor. Amer. 1: 224. 1803. ‘Hab. 
in sylvis remotis et occidentalibus flumini Mississipi confini- 
bus, versus regionem Illinoensium.’’ Surely the plant here 
considered, although not known to occur so far west as the 
type station. 
Oenothera Fraseri Pursh, Fl. Amer. Sept. 2: 734. 1814. “In 
South Carolina Fraser . . . v. v. in Hortis.” 
Kneifia glauca Spach, Hist. Veg. 4: 374. 1835. 
Kneiffia Fraseri Spach, 1. c. 375. 1835- 
