Vor.. II.] EVENING-PRIMROSE FAMILY. 
Flowers axillary. 
Silvery-pubescent with appressed or ascending hairs; seeds striate, 
Glabrous or sparingly hirsute-pubescent; seeds pitted. 
Flowers in terminal bracted spikes. 
1. OEnothera humifusa Nutt. Seaside 
Evening-Primrose. (Fig. 2581.) 
OEnothera humifusa Nutt. Gen. 1: 245. 1818. 
Sl ha sinuata var. humifusa T. & G. Fl. N. A. 1: 494. 
1840. 
Bodaisine and decumbent or ascending, branched 
from the base and usually also above, silvery-pubescent 
with white appressed or ascending hairs; stems 8/—18’ 
long. Leaves sessile or narrowed into a petiole, acut- 
ish or sometimes obtuse at the apex, 14/-2’ long, repand- 
denticulate, the lower pinnatifid; flowers axillary, yel- 
low, nocturnal, 6//-10’’ broad; calyx-lobes linear, 
obtusish, shorter than the tube, somewhat spreading; 
capsule linear, 6’/-12’ long, about 114’” thick, very 
pubescent; seeds striate longitudinally. 
On sea-beaches, New Jersey to Florida. June-Sept. 
. rhombipetala. 
2. OEnothera laciniata Hill. 
leaved Evening-Primrose. (Fig. 2582.) 
OEnothera laciniata Hill. Veg. Syst. 12:64. 1767. 
OEnothera sinuata 1,. Mant. 2: 228. 1771. 
pea minima Pursh, Fl. Am. Sept. 262. p/. 75. 
Decumbent or ascending, simple or sometimes 
branched, 4’-18/ high, glabrous or sparingly hirsute- 
pubescent. Leaves sessile or the lower petioled, 
oval-lanceolate or oblanceolate, acute or obtusish at 
the apex, sinuate-dentate or often pinnatifid, 1/-2/ 
long; flowers axillary (or on small plants some- 
times solitary and terminal), 6’/-18’’ broad; calyx- 
lobes linear-lanceolate, reflexed, much shorter than 
the slender tube; capsule linear, 1/-1 14’ long, about 
1’’ thick, more or less pubescent, straight or curved 
upward; seeds strongly pitted. 
In sandy dry soil, southern New Jersey to Pennsylvania, Illinois and Kansas, south to Florida, 
Texas and Mexico, extending into South America. May-June. Naturalized in Vermont. 
OEnothera laciniata grandis Britton. 
OE. sinuata var. grandiflora S. Wats. Proc. Am. Acad. 8: 581. 1873. Not OZ. grandiflora Ait. 1789. 
OEnothera sinuata grandis Britton, Mem. Torr. Club, 5; 358. 1894. 
Similar to the species, but the leaves more 
prominently toothed and the flowers 2'-2!4' broad. 
Missouri and Kansas, south to Texas, 
3. OEnothera rhombipétala Nutt. 
Rhombic Evening-Primrose. (Fig. 2583.) 
OEnothera rhombipetala Nutt.; T. & G. Fl. N. A. 
I: 493. 1840. 
Erect, simple or rarely branched, finely and 
densely appressed pubescent, 2°-4° high. 
Leaves linear-lanceolate, sessile and rounded at 
the base or the lower narrowed into petioles, 
acuminate at the apex, remotely denticulate, 2/— 
4’ long; flowers spicate, terminal, leafy-bracted, 
yellow, nocturnal, 1/—2’ broad; calyx-lobes lin- 
ear, reflexed, canescent, shorter than the very 
slender tube; petals rhombic-obovate; capsule 
columnar, curved upward, pubescent, 6//-8// 
long, about 1’/ thick; seeds obovoid, tuberculate 
at the top. 
On prairies, Minnesota to Indiana, Nebraska and 
the Indian Territory. June-July. 
