490 



ONAGRACEAE. 



[VOL. II. 



2. Kneiffia Alleni (Britton) Small. 

 Allen's Sundrops. (Fig. 2588.) 



OEnothera fruticosa var. humifusa Allen, Bull. Torr. 



Club, 1:3. 1870. Not OE. humifusa Nutt. 1818. 

 Kneiffia linearis Alleni Britton, Mem. Torr. Club, 5: 



235. 1894. 

 Knnffia Alleni Small, Bull. Torr. Club, 23: 177. 1896. 



Low, perennial, finely appressed-pubescent; stems 

 decumbent, at length diffusely branched, 3 / -2 

 long, wiry and zigzag. Leaves oblanceolate to lan- 

 ceolate, %'-iX' long, usually obtuse, undulate, ses- 

 sile or short-petioled; flowers yellow, about ^'-l' 

 broad; racemes i / -2 / long, usually interrupted: 

 calyx villous, its tube 2 // -3 // long, striate, its seg- 

 ments linear-oblong, as long as the tube; petals 

 orbicular-obovoid, notched at the apex; capsules 

 club-shaped, $"-4" long, the body subglobose, 

 winged, shorter than the pedicels; seeds obovoid, 

 to oblong, %" long, minutely pitted in rows. 



In sand, eastern Long Island. June-Aug. 



3. Kneiffia longipedicellata Small. 

 Long-stemmed Sundrops. (Fig. 2589.) 



Kneiffia longiptdicellata Small, Bull. Torr. Club, 



23: 178. 1896. 



Annual, slender, more or less puberulent; 

 stems erect or assurgent, i-2# tall, red, sim- 

 ple or sparingly branched above. Basal leaves 

 spatulate or obovate-spatulate, i>i / -3 / long; 

 stem-leaves few, linear-lanceolate, i'-2#' long, 

 obtuse or ncutish, entire, sometimes undulate, 

 short-petioled; flowers yellow, i'-2' broad; ra- 

 cemes i '-4' long; calyx hirsute, its tube slender, 

 5 // -7 // long, its segments nearly linear, longer 

 than the tube, the tips free in the bud; petals ob- 

 ovate, emarginate; capsules narrowly obovoid, 

 the bodies about 5" long, their angles with stout 

 pubescent wings, their faces strongly ridged, 

 the pubescent pedicel longer than the body; 

 seeds irregular, less than %" long, minutely 

 papillose. 



New York to West Virginia and Florida. 



May-Aug. 



4. Kneiffia linearis (Michx.) Spach. 

 Narrow-leaved Sundrops. ( Fig. 2590. ) 



nothera linearis Michx. Fl. Bor. Am. 1:225. 1803. 

 Kneiffia linearis Spach, Hist. Veg. 4: 376. 1835. 



Biennial or perennial, slender, pilose or nearly 

 glabrous. Stems erect or ascending, 6 / -2o / tall, 

 simple or much-branched above, finally angled; 

 basal leaves spatulate or broadly oblanceolate, 2'- 

 3' long, entire or nearly so; cauline leaves 

 linear, or linear-lanceolate, 1'-$' long, slightly 

 toothed, acute or obtuse, short-petioled ; flowers 

 yellow, ^'-i^' broad; racemes i'-4' long; 

 calyx slightly pubescent, its tube 4"-6 // long, 

 its segments linear-lanceolate, longer than the 

 tube; petals obovate, shallowly notched at the 

 apex and eroded; capsule oblong-club-shaped, 

 4//_7// long, the angles with papery glabrous 

 wings, its faces ridged, narrowed into pedicels 

 which are much shorter than the bodies; seeds 

 irregular, %" long, angled. 

 Connecticut to Tennessee and Georgia. June-Sept 



