112 /—.  PITTONIA. 
6. C. DIMORPHA. Root perhaps biennial : stem stout and 
fruetiferous below the short, leafy, racemose branches : 
pubescence soft and appressed : subradical flowers probably 
apetalous or cleistogamous, their nutlets ovate, more than 2 
lines long, distinctly carinate dorsally, the marginal angles 
continuous across the back of the nutlet above its base, the 
whole surface coarsely granulate or tuberculate ; ventral 
groove narrow but not closed, ending below in an exactly 
basal, rounded and deeply impressed scar: fruit of the 
terminal inflorescence not seen.—Erilrichium dimorphum, 
Philippi in Herb. Cal. Acad. 
Cordillera de Santiago, Philippi. A very singular species, 
allied to true Hritrichium by its nutlets, otherwise most 
unlike it. 
(B.) NORTH AMERICAN SPECIES. 
* Fruiting calyx closed, deciduous, its segments narrow, 
hispid. 
+ Nutlets muriculate, 
++ one only, or one larger and less roughened. 
T. C. CRASSISEPALA — Hritrichium crassisepalum, T. & G. 
Pac. R. Rep. ii. 171: Krynitzkia, Gray, Proc. Am. Acad. xx. 
268, and Syn. Fl. Suppl. 494. 
8. C. Texana = Erilrichium Texanum, A. DC. 1. e. 130: 
Krynitzkia, Gray, L. e. 
9. C. ANGUSTIFOLIA = Eritrichium angustifolium, Torr. 
Pac. R. Rep. v. 363, and Bot. Mex. Bound. 141; Krynitzkia, 
Gray, L c. 
10. C. DUMETORUM = Krynitzkia dumetorum, Greene in 
Gray, l. c. 
