294 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
TYPE Locauity: Volcin Acatenango, Guatemala. 
SPECIMENS EXAMINED: 
GuateMALa: Volcén Acatenango, Department Zacatepéquez, alt. 1,700 meters, 
March, 1892, J. D. Smith 2528 (type). Alotenango, Department Zacatepé- 
quez, alt. 1,300 meters, March, 1892, J. D. Smith 2527. . 
11. Hauya lemnophila Donn. Smith & Rose, Bot. Gaz. 62: 48.1911. Fiaure 54. 
Hauya longicornuta var. b. oblongifolia Loes. Repert. Nov. Sp. Fedde 12: 237. 1913, 
Probably a small tree; young branches cinereous-hirsute; leaves oblong-ovate to 
oblong-obovate, 9 to 15 cm. long, 4.5 to 7.5 cm. broad, rounded at the base, some- 
what pointed, glabrate above, hirsute beneath; flowers sessile, calyx tube 7.5 to 9cm. 
long, the segments 4.5 to 5 cm. long, with appendages 12 mm. long; petals white, 
33 to 35 mm. long; ovary hirsute, 13 tol4 mm, 
long; capsule linear-oblong, 7.5 to 8 cm, long, 
the valves plane on the back. 
TYPE LocaLity: Laguna de Carrazal, Depart- 
ment of Santa Rosa, Guatemala, altitude 1,500 
meters, 
Known from the type material, collected in 
May, 1892, by Heyde and Lux (J. D. Smtth 
2936), and also from Heyde’s no. 516, which 
may be a part of the type collection. 
2. XYLONAGRA Donn. Smith & Rose, 
gen. nov. 
A low, bushy shrub with numerous short, 
ascending branches; leaves alternate, small, sol- 
itary or in fascicles, with glandular tips; inflo- 
rescence of elongated terminal racemes; flowers 
pediceled; calyx scarlet, the proper tube short, 
abruptly enlarging into a long, funnel-shaped 
throat, the segments 4, short, ovate to triangular, 
about one-third the length of the tube; petals 4, 
scarlet, shorter than the calyx segments; sta- 
mens 8, exserted a little beyond the petals, the 
Fic. 53.—Hauya ruacophila. Type. filaments short, the anthers mucronate; style 
Natural size. exserted beyond the stamens; stigma capitate; 
capsule small, 4-celled, loculicidal; seeds few to 
the cell, in one row, with a small subterminal, acuminate wing; embryo oblanceolate, 
the cotyledons elliptical, thrice longer than radicle. 
This genus differs from Hauya in its bushy habit and small leaves, in the character 
of the inflorescence, in its much smaller flowers, differently shaped calyx tube, highly 
colored petals, short filaments, merely mucronate and not reticulate anthers, much 
smaller capsules of different texture with cells containing one row of few seeds instead 
of two rows of very numerous ones, and in the very small seeds with a different kind of 
wing. Ithas, moreover, a very different range and habitat. 
1. Xylonagra arborea (Kellogg) Donn. Smith & Rose. 
Oenothera arborea Kellogg, Proc. Calif. Acad. 2: 32. pl. 1859. 
Hauya californica 8. Wats. Proc. Amer. Acad. 20: 366, 1885. 
Hauya arborea Curran, Proc. Calif. Acad. II. 1: 253. 1888, 
Low shrub, 60 to 120 cm. high (originally described as 6 to 8 feet), with slender 
woody branches, these when young red and covered with short, appressed, cinereous 
pubescence; leaves petioled, small, the blade lanceolate, 8 to 15 mm. long, entire, 
obtuse, tipped by a large orange yellow, sometimes red, gland, scantily pubescent on 
