OF THE GENUS ARENARIA. 405 
glabra. Radix prelonga robusta lignosa dura. Caules teretes, 
2-10 centim. Folia subulata recurvata rigida pungentia basi 
late scarioso-vaginantia subsquarrosa, facie canaliculata, dorso 
convexa, margine incrassata obscure ciliata, precipue ad basin 
versus, nitida. Flores minuti, breviter pedicellati, bracteis elon- 
gatis euspidato-ovatis ad dimidium ealycem attingentibus iustructi. 
Calyx basi rotundatus ; sepala elliptiea obtusa obsolete trinervia, 
margine haud seariosa. Petala late obovata, apice rotundata. 
Capsula ovoidea. 
B. perlevis, Williams. 
Syn. A. musciformis | non Triana et Planch.], Edgew. /. c. 
Sepala oblongo-lanceolata fere acuta membranaceo-marginata. 
In his * Fl. Tangutica,’ Maximowicz points out that in the 
specimens of A. musciformis collected by Capt. Strachey, which 
he carefully examined, the flowers are white and are not séssile 
but shortly pedicellate, which makes the plant agree still more 
with typical A. polytrichoides. He also notes that the bracts 
are elongated, ovate and cuspidate, reaching to half length of 
thecalyx. If A. musciformis were not reduced to this species, the 
nme would have to be changed, as there is an earlier use of the 
name for a S. American species. Specimens have been collected 
at an altitude of 5900 metres, which is higher than that of any 
other species of Arenaria. It forms matted hard tufts, tougher 
than those of 4. pulvinata; and there is a good specimen 
mounted in a glass case in the Kew Museum. 
Hab. Tibet: Balch, Karakoram and the Parang Passes, south 
shore of Lake Mans-isa-Iso in N.W. Tibet (Capt. Deasy's 
Exped. to Tibet, 1896-97, no. 813); alpine region of Sikkim 
Himalaya on the Tibetan side. China: Ba-tang on the river 
chu, and at Ta-chien-lu on the river Tung, in the prov. of 
Sze-chuen (Kanitz, Bot. Centr. Asiat. Exped. Szechenyi, in Math. 
Naturwissensch. Ber. Ung. iii. [1886]). 
12. A. punvinara, Edgew. in Hook. f. Fl. Brit. Ind. i. p. 235 
(1874); Jacks. Ind. Kew. i. p. 180. . 
ensissime et pulvinatim cæspitosa, cæspitibus subglobosis 
“mpactis, pallide virens, subsquarrosa. Folia plana brevia sub- 
Uato-reenryata mueronata, basi semi-tereti scarioso-vaginante, 
Pagine hispido-ciliata. Flores sessiles non bracteati. Calyx 
! rotundatus ; sepala ovato-lanceolata subacuta, nervis 3 
Pproximatis, margine cartilagineo-scariosa. Petala obovata, 
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