GAYOPHYTUM AND BOISDUVALIA. J21 



with incurved tomentum, though in habit it bears a rather 

 close resemblance to B. densiflora. 



B. cleistouama Curran, Bull. Calif. Acad. 1884, i. 

 12 ; Mrs. Brandegee, Zoe, iii. 870.— A span or two high, 

 decumbently branched from the base, very villous to gla- 

 brous except for a few spreading hairs ; leaves pale, an inch 

 or two long, lanceolate to linear lanceolate, acute, remotely 

 denticulate to sharply serrulate, the upper similar ; flowers 

 axillary along the branches, shorter than the subtending 

 leaves, " the earlier ones fertilized in the bud and never 

 expanding; " corolla rose purple, 2 to 4 



mm 



long; cap- 

 sules stout, spreading from the stem, acute, 10 to 15 mm. 



long, sharply 4-sided and with 4 intermediate nerves, (tar- 

 dily loculicidal?), much surpassed by the leaves; seeds 

 numerous, about .5 X 1.4 mm.— Calif ornia(Antioch, Bran- 



1883) 



May 1886 ; Elmira, Mrs. Curran, May and Aug. 



In aspect this is between glabella and stricta, but its 

 capsular characters are quite unlike those of other species. 



Besides these North American species, Jackson enumer- 

 ates the following Chilian species, referring them to 

 Oenothera: — B. andina Phil., B. concinna Spach, B. 

 Tocornalii Gay, and B. Volckmanni Phil., — which I 



have not in sufficient material to warrant a revision of the 

 South American forms. 



EXPLANATION OF PLATES. 



The figures were drawn from herbarium specimens by 

 Miss Grace E. Johnson, under supervision of the author, 

 and details are from his sketches. 



ermum 



1 , Habit, natural size ; 2, cap- 

 sule, enlarged ; 3, dehiscent capsule, X5; 4, hair from ovary, X 200 ; 5, 

 stigma, X 37 ; 6, three seeds, X 18. 



Plate 18, G. eriospenmim. — l, Habit, natural size; 2, branch, X 2; 3, 

 long and short stamen, from one flower, X 18; *, pollen grain, X 200; 



stigm 



an 



Plate 19, O. diffusum. — 1, Habit (from a Nuttall specimen), natural 



15 



