A REARRANGEMENT OF AMERICAN PORTULACES. 31 
marcescent-persistent. Petals 8 to 16. Stamens ©. Cap- 
sule circumscissile at the base, then bursting irregularly. 
Cotyledons accumbent. 
1. L. reprvrva, Parsh, 1. c. Leaves subterete, rosulate 
at the crown of a thick fleshy root: 1-flowered scapes with a 
whorl of bracts marking a joint near the middle; flower 
white or pinkish, large and showy.—Washington and Cali- 
fornia, and eastward to the Rocky Mountains. 
4, OREOBROMA, Gen. Nov. Sepals 2 (in one species 
apparently 4), persistent. Petals 3 to 10 or more. Stamens 
5 to 20 or more, usually not of the same number as the 
petals. Style 3 to 7-cleft. Capsule membranaceous, cir- 
cumscissile at the base, thence splitting upwards irregularly, 
several seeded. Cotyledons incumbent.—Low acaulescent 
perennials with fleshy roots, and a multicipal caudex bearing 
tufted leaves, and scapose stems which are jointed at the 
base. Species taken out of Calandrinia, Lewisia and Clay- 
tonia of recent authors, and forming a natural genus, named 
in allusion to the edible fleshy roots. 
* Root branching, the caudex at the surface of the ground; 
nerves of bracts and sepals excurrent, gland-tipped. 
+ Scapes 1-flowered. 
1. 0. brachyealyx. Lewisia brachycalyx, Engelm. 
Proc. Am. Acad. vii. 400. Leaves spatulate or nearly linear: 
scapes shorter than the leaves, 2-bracted at the very base: 
sepals apparently 4: petals 7 to 9, twice or thrice longer than 
the sepals: stamens 10 to 15.—In granite sand, eastern Cali- 
fornia to Arizona and southern Utah. 
+ + Flowers many, in panicled racemes. 
29. 0. Leana. Calandrinia Leana, Porter, Bot. Gaz. 
i, 43. Glaucous; leaves terete or nearly so, acute: scape 
