: eae 
60 BOTANICAL GAZETTE [yore 
which were supposed to distinguish this variety sufficiently from 
S. bistorta and to constitute it a species become less well-defined 
the larger the series of specimens. Even the greater length of capsule 
and beak seems to be a variable quantity. 
13. S. SPIRALE (Lehm.) Fish. & Mey., Ind. Sem. Hort. Petrop. 
2:50; Ocenothera spirale Lehm. in Hook. Fl. Bor. Am. 1:213.— 
Assuming it to be a fact that this Californian plant is distinct from 
S. cheiranthijolium of South America, the specific name as given by | 
LeHMAN in Hooker’s Flora is the next available one. 
13a. S. SPIRALE viridescens (Lehm.), n. comb.; Oecenothera 
viridescens Lehm. in Hook. Fl. Bor. Am. 1:214.—If this be a good — 
species, it certainly is very difficult to distinguish from the preceding. 
It was given only varietal rank by Watson in his revision (Proc. — 
Am. Acad. 8:592), under the name suffrutescens—the woody base 
and possibly perennial duration, with the somewhat larger flowers, 
being the characters that he used. But even in these respects the 
species and the variety seem to grade into one another. 
13b. S. SPIRALE Clypeatum (Lévl.), n. comb.; Oenothera cly peala 
Léveillé, Monog. Oenothera, ae Ditenzaishable by the broad, 
shield-shaped leaves which are densely canescent, and by the large 
flowers (often 4°™ across). 
14. S. DECORTICANS (H. & A.) Small, Bull. Torr. Bot. Club 
23:191; Gaura decorticans H. & A. Bot. Beech. Voy. 343.—SMALL _ | 
seems to be well within bounds when he assigns priority to the ~ 
name of Hooker and Arnot. The species, though apparently 
greatly variable, is so merely before it begins to blossom when qui . 
small, at which time it is smooth and erect. With age it becom 
large, more spreading, and roughened with the loosened shining 
shreddy bark. Warson’s characterization of the seeds as “cellular- 
pubescent” is a good one. 7 : 
15. S. tortum (Lévl.), n. sp.; Oenothera chamaenerioides torla 
Lévl., Monog. Oenothera, 230; O. alyssoides minutiflora Wats. 
Pris Am. Acad. 8:591.—Branched from the base and spreadin 
becoming at length nearly prostrate; leaves glabrous, mostly basal, 
oblanceolate and tapering into slender petioles: capsules about 2 
long, cinereous, variously contorted. 
L£VEILLE is right in allying this with S. chamaenerioides, but on habit al 
to say nothing of the fruits, it is entitled to a rank. 
