Tas. 8220. 
LEWISIA CorTyLEDON. 
North America. 
PORTULACACEAE. 
Lewisia, Pursh; Benth. et Hook. f. Gen. Plant. vol. i. p. 159. 
Lewisia Cotyledon, Robinson in A. Gray Synop, Fl. N. Am. vol. ii. p. 268; 
species L. Tweedyi, Robinson (B. M. t. 7633), proxima, differt pedunculis 
plurifloris, bracteis ciliatis et peta'is contiguis. 
Herba perennis, acaulis, praeter glandulas stipitatas glabra, caudice incrassato. 
Folia carnosa, rosulata, oblonga, oblanceolata vel spathulata, 4-6 em. longa, 
margine primum glanduloso-ciliata, Pedunculi 10-12 em. alti, 8-12-flori, 
bracteis ovato-oblongis circiter 1 cm. longis glandulos: -ciliatis infra flores 
instructi; pedicelli cymosi, 1-2 cm. longi, primum recurvi. //ores circiter 
3°5 cm. diametro, albi, roseo lineati. Sepal« 2, libera, truncata, apice fere 
1 em. diametro, glanduloso-ciliata, marginibus in alabastro late obtegentia, 
unum exterius, unum interius, Petal« numero variabilia sed saepius 9 vel 
10, spathulata, erosa, recurva. Stamiva 7-10, petalis triente breviora ; 
filamenta basi connata. Ovarium uniloculare, circiter 20-ovulatum ; stylus 
stamina aequans, trifida.—Calandrinia Cotyledon, 8S. Wats. in Proc. Am. 
Acad. Se. vol. xx. (1885), p. 355. Oreobroma Cotyledon, Howell in Erythea, 
vol. i. (1898), p. 82. 
The delimitation of the genera Lewisia and Calandrinia 
is a subject as to which authors are by no means in agree- 
ment. Robinson in the place cited above extends Lewisia, 
and includes under it the Oreobroma of Howell, and he is 
followed here, as he was by Sir Joseph Hooker under 
t. 7633. But we are not convinced that this is a good 
solution of the difficulty.  Lewisia rediviva, Pursh (B. M. 
t. 5395), the species on which the genus was founded, 
differs from the present plant in having usually seven 
sepals, numerous petals, indefinite stamens and about eight 
style-branches, and has perhaps valid claims to independent 
generic rank. : 
Lewisia Cotyledon is a very attractive plant; its flowers 
remind one strongly of those of some species of Ozalis. 
Desoription.— Perennial, stemless, with a thickened 
root-stock. Leaves fleshy, rosulate, oblong-spathulate, 
13-23 in. long, glandular on the margin when young. 
OctosEr, 1908, 
