240 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
EXPLANATION OF PLATE 67.—From a photograph of the type specimen as it flowered in Washington. 
Natural size. 
Epiphyllum gaillardae Britt. & Rose, sp. nov. Prate 68, 
Much branched, especially below; joints terete at base, gradually widening above, 
5 cm. broad at widest part, obtuse, light green or reddish when young; areoles separated 
by low scallops, the basal areoles (as also those of the seedling) bearing a tuft of 
white hairs; calyx tube slender, 18 to 20 cm. long, pinkish, bearing a few scattered 
bracts; petals white, 3.5 cm. long, very narrow, acute; style deep red; fruit narrowly 
oblong, 12 cm. long, 3 cm. in diameter, magenta-colored, the surface marked here and 
there by short ribs running down from the backs of the scattered bracts. 
Type in the United States National Herbarium, no. 691240, collected in the Canal 
Zone, Panama, August 6, 1909, by Mrs. D. D. Gaillard. 
Common in the Canal Zone and adjacent parts of Panama; first sent by Mrs. 
Gaillard, for whom it is named. . 
Mr. Pittier reports that the seeds of this species germinate while the fruit is still 
hanging on the plant. When he returned from Panama in March, 1912, he brought 
one fruit covered with the green seedlings. 
The name Epiphyllum has priority over Phyllocactus. The later Epiphyllum 
of Pfeiffer, still in use by some writers, must revert to Zygocactus. 
EXPLANATION OF PLATE 68.—From a photograph of a living plant collected at Porto Bello, Province 
of Panama, by H. Pittier, April, 1912. Slightly more than two-thirds natural size. 
Hylocereus minutiflorus Britt. & Rose, sp. nov. PLATE 69. 
Very slender, high-climbing vines, 3-angled, the angles sharp but not winged, 
deep green; areoles distant (2 to 4 cm. apart), the spines 1 to 3, minute, brownish; 
flowers 5 cm. long, opening at night; flower tube wanting or nearly so (10 mm. long), 
red except the greenish base; sepals linear, red at the tip, 3 to 4 cm. long; petals white; 
stamens white, about 1 cm. long, borne in one series ‘at the base of the petals; style 
white, 2 cm. long, thick. 
Type in the United States National Herbarium, no. 619842, collected near Lake 
Izabal, Guatemala, in 1907 by R. H. Peters and flowered in Washington in June, 
1909, and June and July, 1911, and in 1912. 
The flowers of this species are unusually small, but the vines are healthy and 
produced,a few flowers in 1909 and 1911, and an abundance in 1912. The plants have 
been under observation since 1907. 
EXPLANATION OF PLATE 69.—Flowering branch from the type specimen, in cultivation. Natural size. 
Nyctocereus guatemalensis Britt. & Rose, sp. nov. PLaTEs 70, 71. 
Stems half-erect, arching, creeping, or even prostrate, 3 to 6 cm. in diameter; ribs 
8 to 12, very low; radial spines about 10; centrals 3 to 6, usually much longer than 
the radials, the longer ones 3 to 4 cm. long; flowers very fragrant, 4 to 5 cm. long; 
ovary somewhat tuberculate, each tubercle crowned by an areole bearing a cluster of 
pinkish or brownish spines; outer sepals brownish ; petals lanceolate, acute, nearly 
white; stamens much shorter than the petals, attached all along the surface of the 
wide throat; style stout, 3 cm. long; fruit small (about 2 cm. long), spiny; seeds 
black, shining, 3 mm. in diameter. 
Type in the United States National Herbarium, no. 53597 7, collected at El Rancho, 
Guatemala, April 4, 1905, by William R. Maxon (no, 8510). 
The following collections have been examined: 
GUATEMALA: El] Rancho, April 4, 1905, Maron 8510; June 8, 1908, Deam 6249a; 
without definite locality, 1909, F. Eichlam. 
Individuals from all three of these collections are now growing in Washington. 
Mr. Maxon’s plant flowered in July, 1910, and Mr. Eichlam’s in 1911. 
EXPLANATION OF PLATES 70, 71.—Plate 70, part of a flowering plant, incultivation. Natural size. Plate 
71, A, B, two views from Guatemala showing the habit of this species. From negatives furnished by 
Charles C. Deam. 
