SCROPHULARINEA, 463 
23. Castilleja sessiliflora, Pursh, Fl. Am. Sept. ii. p. 738; DC. Prodr. x. p. 531; 
Torr. Bot. U.S. & Mex. Bound. Surv. p. 119; A. Gr. Synop. Fl. N. Am. ii. p. 298. 
Wisconsin and ILuwors to SaskarcHEwAN and Daxora, and south to Texas and New 
Mexico.—NortH Mexico, Santa Maria, Chihuahua (Schott), mountains east of Saltillo 
(Palmer, 993). Hb. Kew. 
24. Castilleja tenuiflora, Benth. Pl. Hartw. p. 22; DC. Prodr. x. p. 533. 
Sour Mexico, Aguas Calientes (Hartweg, 191). Hb. Kew. 
25. Castilleja tenuifolia, Mart. et Gal. in Bull. Acad. Brux. xii. 2, p. 30; 
Walp. Rep. vi. p. 651. 
Castilleja anthemidifolia, Benth. in DC. Prodr. x. p. 528. 
Soura Mexico, Cordillera of Oaxaca, 3000 to 8000 feet (Galeotti, 995 ; Ghiesbreght). 
Hb. Kew. 
26. Castilleja tolucensis, H. B. K. Nov. Gen. et Sp. ii. p. 829 ;- DC. Prodr. x. 
p- 530; Mart. et Gal. in Bull. Acad. Brux. xii. 2 (reprint, p. 15). 
South Mexico, Volcan de Toluca, 8250 to 12,000 feet (Humboldt & Bonpland; 
Galeotti, 1090), peak of Orizaba at the extreme limits of phanerogamic vegetation, 
13,000 feet (Galeotti, 1075). Hb. Kew. 
38. ORTHOCARPUS. 
Orthocarpus, Nutt. Gen. N. Am. Pl. ii. p- 56; Benth. et Hook. Gen. Plant. 1. p. 974. 
About twenty-four herbaceous species, inhabiting North-west America, one Mexico, 
and one the Andes of South America, southward to Chili. 
1. Orthocarpus mexicanus, Hemsley, n. sp. (Tab. LXIII. A. figg. 1-6.) 
Nanus, facie Castilleje sessiliflore, a qua differt calyce multo breviore lobis breyiter bifidis, corolla 
longissime exserta. 
Herba annua (?), erecta, 8-6 poll. alta, hirsuta, caulibus dense foliosis. Folia sessilia, pinnatifida, 
lobis linearibus utrinque sepius 2. Flores sessiles, 2-24 poll. longi, erecti; bractez calyce 
breviores, basi late, trinerviz, alte trilobate, lobis linearibus, obtusiusculis, lateralibus paullo 
brevioribus ; calyx antice posticeque fissus, lobis distincte bifidis ; corolla calycem triplo superans, 
gracilis, puberula, labiis subzequalibus, inferiore tripartito, basi obscure saccato ; antherze bilo- 
culares, suboblique, loculis linearibus. Capsulam maturam non vidi. 
Nort Mexico, Zacatecas (Coulter, 1355), near San Luis Potc ‘Schaffner, 82). 
Hb. Kew. | 
Although this is very closely allied to Castilleja sessilifiora, we have preferred placing 
it in Orthocarpus, because it certainly ought to go into the same genus as O. australis, 
and because it differs from nearly all the species referred to Castilleja in the bifid lobes 
of the calyx, and in the long exserted corolla with nearly equal lips. Perhaps it would 
be better to place Castilleja sessiliflora and one or two allied species in Orthocarpus. 
EXPLANATION OF TAB. LXIII. A. Fiee. 1-6. 
Fig. 1, a flower with subtending bract; 2, front view of a flower; 3, upper portion of corolla laid 
open, showing the insertion of the stamens; 4 & 5, anthers ; 6, a pistil: all enlarged. 
