LICHENS OF SANTA CRUZ PENINSULA 393 



I. SPH/EROPHORUS GLOBOSUS (Huds.). 



Thallus fruticose, tufted and shrub-like, erect, branched, 

 terete, smooth, with short, fine, and very numerous terminal 

 branchlets, these often in clumps which shatter off very readily ; 

 color silver}' gray or whitish but varying to brownish or a de- 

 cided brown ; rarely reddish. Alike on all sides. Medullary 

 layer densely cottony. Apothecia terminal, within the swollen 

 and globular tips of the fertile branches, which split open ex- 

 posing the globose apothecia ; spores violet-black, simple, 

 spherical. 



On trees, dead wood, and sandstone. On the Pacific side of 

 the peninsula occurring from near sea-level to the summit of 

 the range, but not descending on the Bay side more than a few 

 hundred feet, remaining within the limits of the spruce and red- 

 wood forests. Occasionally found in great abundance. A 

 handsome and striking looking plant. 



Lichen globosus Hudson, Fl. Anglica, vol. i, 460. 1762. 

 Lichen glohifcrns L. Mantissa 133. 1767. 



Sphcsrophorus globiferiis DeCandolle, Fl. Fr. 3d ed. 1805. 

 Sphmrofhoron coralloides Persoon, Usteri Annal. d. Bot. i : 



23. 1794. 



XXII. Dermatocarpon (Eschw.) Th. Fr. 



Thallus foliaceous or squamulose, umbilicate or appressed 

 and adnate. Apothecia ver}'- small, immersed, appearing as 

 minute specks on the surface ; spores ellipsoid or ovoid, simple, 

 colorless, usually 8 in the obsolete paraphyses. 



On rocks and earth. 



Our squamulose forms not included in the present paper. 

 Dermaiocarfon Eschweiler, Syst. Lich. 16. 1824; in part. 



Th. Fries, Genera, 103. 1861. 



KEY TO THE SPECIES. 



a. One-leaved, large : i. ?niniatu?n, t,<^^. 



aa. More or less polyphyllous. 



b. Thallus more or less cttspitose, the convolute and complicate 



lobes ascendant 2. ynijiiattun cojuplicatum^ 394* 



bb. Thallus pseudo-crustaceous, small, closely appressed. 



3. aqiiaticiun^ 394* 



