| 
) 
APPENDIX. 275 
On page 111, vol. u, under Wilcoxia striata, insert: According to T. S. Brandegee 
(under date of June 8, 1921), the flowers of Wilcoxia striata are nocturnal. 
On page 112, vol. 11, under Pentocereus greggii, add to illustrations: A Gard. 11: 
474, as Cereus greggit; Journ. Wash. Acad. 12: 329. f. 1; Succulenta 4: 71. 
On page 113, vol. I, insert: 
2. Peniocereus johnstonii Britton and Rose, Journ. Wash. Acad. 12: 329. 1922. 
A climbing or clambering plant, up to 3 meters long, with a very large fleshy root sometimes 
weighing 14 pounds; stems and branches 3 to 5-angled, the young growth not pubescent; spines 
9 to 12, brown to black, glabrous; upper radial spines short, stubby, swollen at base, nearly black, 
the two lower light brown, elongated, bristle-like, reflexed; central spines 1 to 3, subulate, 4 to 
8 mm. long; flower (only an old flower seen) about 15 cm. long; perianth-segments about 3 cm. long; 
the lower and outer ones bearing tawny hairs and long bristles; flower-tube slender, with prominent 
areoles on knobby projections and bearing tawny wool and bristly spines; fruit ovoid to oblong, 
about 6 cm. long, bearing prominent clusters of black spines, dry (?), many-seeded; seeds oblong, 
3 mm. long or more, black, shining; seedling dark purple; cotyledons very thick, triangular. 
Type locality: San Josef Island, off the east coast of southern Lower California. 
Distribution: Southern Lower California. 
This plant was always found growing up through bushes of Olneya tesota. 
Illustrations: Journ. Wash. Acad. 12: 330. f. 2; Succulenta 4: 73. 
Figure 248 shows'a branch, old flowers, and seeds of the type specimen. 
Fic. 248.—Peniocereus johnstonii, showing branch, old flower, and seeds. 
On page 113, vol. 1, under Dendrocereus nudiflorus, insert: In 1922-Dr. L. H. Bailey 
sent us two photographs and some stem-sections (No. 806) which-he had obtained’ from 
the Botanic Garden at Roseau, Dominica. It grows as a low, rounded, much branched 
bush with the outer joints often pendent. Mr. Joseph, Jones, curator of the Botanic 
Garden wrote that the group is made up of six plants which have not been cut back or 
interfered with in any way and have experienced two hurricanes without having a piece 
broken off. One of our colleagues, Dr. William R. Maxon, who had rediscovered this’plant 
some years ago in Cuba, suggested that the plant grown in Dominica might be that 
species; a careful study of our material convinces us that he is correct. Dendrocereus 
nudiflorus, however, is naturally a large tree with a very definite trunk and a large, much 
branched top. An explanation of this inconsistency 1s that the Dominican plant was 
doubtless grown from cuttings, causing it to assume this bushy habit, a phenomenon also 
observed in other cacti. 
Also insert: Cereus undiflorus is a misspelling, used by Sauvalle (Fl. Cuba 59. 1873) 
and reprinted in the Index Kewensis (1: 493). 
Figure 249 is from one of the photographs sent us by Dr. Bailey. 
