129 



(B) PERENNIALS; STEMS C/ESPITOSE FROM A THICli, 



WOODY ROOT. 

 ^ Maritime or alkaline flat species of the Pacific Coast. 



7- TisSA MACROTHECA (Hornem.) Arenaria macrotheca, 

 Hornem. in Cham. & Schlecht., Linnaea, i. 53 (1826); Lepigomim 

 matrotheaim, Fisch. & Meyer, Cat. Sem. Hort. Petrop. 1835), 



Leaves broadly linear, 2-3 mm. wide, 2-5 cm. long; stems 

 stout, ascending; plants dark green, entirely smooth or densely 

 glandular pubescent. 



Hab. Oak Ray, Vancouver Island (Macoun) and southward 

 to Southern California both maritime and Inland, as on " alkaline 

 lands San Bernardino Valley, perennial, fleshy rooted, almost 

 tuberous," (Parish, 1331). 



Var. SCARIOSA, n. var. Low, (2-10 cm.), glandular; leaves 

 broader, lanceolate-linear, crowded; stipules very large and con- 

 spicuous, ovate-acuminate, nearly as long as the leaves. 



Hab. Near San Francisco (Torrey, No. 41) ; coast of Monte- 

 rey (Hooker and Gray, 1877) J ^"<^ Cypress Point, near Monterey, 

 on maritime rocks (Gray, 1885). 



8. TisSA PALLIDA, Greene, in litt. Leaves broadly linear, 



cm. long, smooth; pedicels, calyx and upper portion of the 

 stem densely glandular pubescent, lower leaves and joints of the 

 stem smooth ; plants stout, very light colored, whence the name. 



Hab, Clayey bluffs overhanging the sea, prostrate, forming 

 dense tufts, near San Francisco, June, 1887 (Greene) ; Monterey? 

 (Meehan in Herb. Phila.). 



9 TisSA VILLOSA (Pers.), Britt., Bull. Torr. Club, xvi. 62. 



Leaves filiform-linear, densely clustered in the lower axils, stems 

 erect or ascending, slender, glandular pubescent; plant dark green. 



Hab, In alkaline soil, Southern California, San Diego, (Cleve- 

 land, 526); alkahne ground, San Jose (Mrs. A. E. Bush, 1879). 

 Also in western South America. The Californian plants differ 

 very slightly from Andean specimens in having smaller capsules, 

 but I have little hesitation in referring them to this species. 



** Species of the mountainous regions of North Mexico. 



10. TiSSA Mexicana (Hemsl.) {Spergularia Mexicana, 

 HcmsL Bot Biol. Cen.-Amer.). 



Leaves hardly succulent, flowers ''yellowish." 

 Hab. Near San Luis Potosi (Parry and Palmer). 



