270 PLANTS GROWING IN DRY SOIL. 
The evening primrose is then in its glory; the next day its 
fragile petals are wofully faded. 
SCAPOSE PRIMROSE. (Plate CXL.) 
Pachylophus cespitosus. 
FAMILY COLOUR ODOUR RANGE TIME OF BLOOM 
Evening primrose. White or pink. Scentless. Nebraska south- June, July. 
ward and westward. 
Flowers: large; one and a half to five inches broad; terminal; solitary. 
Calyx : with four linear sepals. Coro//a : with four obcordate, spreading petals. 
Stumens: eight, with linear anthers. /%s¢/ : one; stigma, four-cleft. Frw/t: 
growing in a clusterat the base. Leaves; from the base; lanceolate; tapering 
into a slender petiole; pubescent. Slower-stalks: ciliate, or beset with white 
hairs. 
It is owing to the growth of the fruit of this superb flower 
that it has been separated from the (Enothera division of the 
primrose family, and no longer bears the name of (CEnothera 
marginata, as it did at onetime. The plant from which the 
illustration was drawn was a particularly well developed and 
perfect specimen. The blossoms were fully five inches in dia- 
meter. Near the Blue Mountains and about the Salmon Falls 
of the Snake River, they unfold generously their silken petals. 
ALLEN’S SUNDROPS. 
Kneiffia Allent. 
FAMILY COLOUR ODOUR RANGE TIME OF BLOOM 
Evening primrose. Palejellow. Scentless. Eastern Long Island. Summer. 
Flowers: on long pedicels in loose corymb-like clusters. Calyx: with a long 
tube and four lobes. Coro/la: of four rounded petals. Stamens: eight 
with lorg versatile ‘anthers. /P/st//: one ; stigma, four-branched. Leaves: 
alternate ; lanceolate. Stew : branched ; leafy ; somewhat rough. Pods: cu- 
cumber-shaped ; four angled at the top. 
An open dry place that is brightened by clusters of these 
flowers appears as though the sun were dancing among the 
green leaves of the plant. The blossoms are slightly deeper in 
colour than those of the evening primrose and remain open in 
the sunshine. Probably they do not depend upon the pink 
night moth for fertilization as they are without the fragrance 
that attracts him to the evening primrose. They are very 
perishable and droop shortly after being picked, 

