ROSE—-MEXICAN AND CENTRAL AMERICAN PLANTS. 263 
A list of these hosts and the localities from which they came is as 
follows: 
HOSTS OF SPECIES OF PILOSTYLES. 
Host. Parasite, Locality. 
Parosela canescens Rose. Pilostyles glomerata. Tehuacdin, Puebla. 
Parosela emoryi (A. Gray) Pilostyles thurberi. Southwestern Arizona. 
Heller. 
Parosela formosa (Torr.) Vail. _ Pilostyles covillei. Texas. 
Parosela hospes Rose. Pilostyles pringlei. Near Monterey, Nuevo Leon. 
Parosela leucostoma Rose. Pilostyles palmeri. San Luis Potosf. 
Parosela microphylla Rose. Pilostyles sp. Sierra del Mesa, Hidalgo. 
Parosela tuberculata Rose. Pilostyles sessilis. Hidalgo and Querétaro. 
Bauhinia lunarioides A. Gray. — Pilostyles globosa. Near Monterey, Nuevo Leon. 
Calliandra grandiflora Benth. —_Pilostyles mexicana. Zacualpan, Vera Cruz. 
The following are the North American species: 
Pilostyles covillei Rose, sp. nov. Figure 20, 
Similar to P. glomerata, but the flowers smaller (2 mm. long), style wanting, sta- 
mens in three rows; ovary slightly 4- 
lobed within; ovules covering the whole 
wall. ‘ 
The host is Parosela formosa (Torr.) 
Vail. 
Collected by Frederick V. Coville at ! 
Matador ranch, Dickens County, Texas, c 
June 14, 1894 (no. 1860, type), between 
Big Springs and Dorwood ranch, Texas, F's. 20.—Flowers of Pilostyles covillei. a, Female 
flower, the ovary exposed; b, cross seetion of 
9, 1904 (no. 1891). , ; . . 
June 19, 190 (n ‘ ) ovary; c. longitudinal section of male flower. 
Type U.S. National Herbarium no. gaajeg, 
500506. 
Pilostyles globosa (8. Wats.) Solms-Laub. in Ingler, Pflanzenreich IV. 75: 
14. 1901. 
Apodanthes globosa 3. Wats. in Robins. Bot. Gaz, 16: 84. 1901. 
Host Bauhinia lunarioides A. Gr. 
Pilostyles glomerata Rose, sp. nov. FIGuRE 21, 
Flowers 3 mm. long and nearly as broad at base; female flowers usually on 
separate host plants; bracts and sepals 4 each, dark brown with lighter margins, 
more or less unequal, orbicu- 
lar to shortly oblong, rounded 
at apex; petals 4, purple, 
rounded at apex; style short 
but distinct, stigma cap large, 
bearing asmall cone at apex; 
ovary one-celled, 4-lobed 
within, the inner surface 
covered with ovules; male 
flowers with similar bracts 
Fig, 21.—Flowers of Pilostyles glomerata, a, Female flower, the and perianth parts; stamen 
ovary exposed; 6, eross section of same; c, male flower. 
Scale 6, 
column short but distinct, 
with a broad rounded cap, 
anthers wanting (apparently few, as the band upon which they stand is very 
narrow). 
The host is a Parosela, perhaps 2. canescens Rose, 
