SPECIES AND VARIETIES. 235 



S. villosum : animal ; stems erect, nearly simple, 3-4 inches 

 high, the upper part of the plant with short viscid hairs; 

 leaves linear, flat above, alternate or scattered ; flowers few, 

 pale dingy rose colour, in a small, loose, terminal cyme. — 

 Mountain bogs and stony rills. Fl. June, July. 



tt Flowers yellow. 



S. acre : stems numerous, short, tufted, glabrous, procum- 

 bent, the erect ascending flowering branches 1-3 inches high ; 

 leaves small, thick, ovoid, or sometimes nearly globular; 

 flowers bright yellow, in small terminal cymes. — Wall Pepper. 

 — Walls and rocks. Fl. June. 



S. rupestre : tufted, with numerous short barren shoots, 

 1-3 inches long, the terminal flowering stems ascending \-\ 

 foot high ; leaves narrow, cylindrical, shortly spurred at the 

 base ; flowers large, yellow, forming a terminal cyme of 4-8 

 recurved branches, each bearing 3-6 sessile flowers. — Old 

 walls and stony places. Fl. July. 



(95) Sempervivum. Houseleek. 

 S. teetorum : barren shoots forming globular tufts ; flower- 

 ing stems stout, succulent, one foot high; leaves very thick, 

 fleshy, ending in a short point, fringed; flowers pink, sessile 

 along the spreading or recurved viscid branches of the cyme ; 

 petals linear. — Cottage roofs and old walls. Fl. July. 



(96) Saxifraga. Saxifrage. 

 * Flowers yelloiv. 

 S. aizoides : flowering stems ascending about six inches 

 higb ; leaves alternate, narrow, smooth, shining, entire, rarely 

 with 1-2 teeth ; flowers yellow, in a loose panicle of 3-12 or 

 more ; calyx segments almost as yellow as the petals. — Wet 

 rocks in mountainous districts. Fl. June to September. 



