PARRY CEANOTHUS. 173 



young; leaves somewhat coriaceous, crowded, fasciculate, small — 5 to 

 8 mm. long — ovate, obtuse, narrowed at base to a short petiole, irreg- 

 ularly crenate, with frequent resinous glands, obscurely triple-nerved 

 near the base, not revolute at the margin, but inclined to fold back on 

 the midrib; inflorescence terminal and axillary, loosely globose, or 

 slightly elongated; flowers few, on short pedicels, light blue; fruit tri- 

 angular, 3-4 mm. broad, sharply crested at the summit. 



Habitat: — A densely- branched shrub, 3 to 5 feet high, with light 

 green leaves, more or less resinous glandular; has been referred to C. 

 dentatus — included above as a variety of C papillosus — from which it 

 differs in every essential character. In its general features, it comes 

 nearest to the South Atlantic coast species, forming, with them, a well- 

 marked group, approximating the Section following. The specimens 

 seen were collected in the upper Napa Valley, where it is abundant, 

 being associated with C. Parry i and C. diver gens. 



B. § Cerastes. Leaves opposite or alternate, persistent for several 

 seasons, rigid coriaceous, entire or spinosely toothed, not glandular, 

 smooth above, with a circular areolate pubescence beneath between 

 the veins; stipules thick, corky at base, with deciduous tips; inflores- 

 cence short, fasciculate umbellate, from buds fully formed the previous 

 season ; fruit conspicuously crested, with accessory appendages. 



Group VII. Rigidus. 

 Character same as Section. Eight species. 

 Opposite leaves. 



26. C. rigidus, Nutt. Monterey, and coast ranges of Central and 

 Southern California. 



27. C. crass if otitis, Torr. Widely spread through the mountain dis- 

 tricts of Southern California. Foliage somewhat variable, but general 

 habit quite constant. 



28. C. prostratus, Benth. Elevated pine ridges of the northern 

 Sierra Nevada. 



29. C. divergens, n. sp. Branches rigid, divergent, hoary pubescent 

 when young; leaves 10-20 mm. long, 5-10 mm. broad, very rigid 

 coriaceous, cuneate at base to a very short petiole, broadly truncate at 

 summit, with prominent midrib, the principal pinnate veins terminating 

 in sharply mucronate broad serratures, dull green above, with distinct 

 rows of tufted areolar pubescence beneath; inflorescence in short um- 



