NOVITATES OCCIDENTALES. 68 
Calyptridium monospermum. Diminutive annual, or 
perhaps biennial, but with the rosulate-tufted radical leaves 
and umbellately congested terminal spikes of C. umbellatum: 
leaves small, obovate-spatulate, acutish: sepals round-reni- 
form, the herbaceous middle portion sharply rugulose: 
petals 2, spatulate-oblong, obtuse: capsule nearly or quite 
orbicular, 1-seeded: seed round-reniform. 
Big Cottonwood Meadows, Inyo Co., Calif., 5 Aug. ., 1891, 
F. W. Koch. This is the Calyptridium that is most 
extremely remote, in character, from what has been called 
Spraguea; yet Mr. Coville (Death Val. Exp. p. 282) has 
thought it to be “Spraguea umbellata,” and so catalogued it. 
His presuming to reinstate Spraguea is therefore singularly 
infelicitous. 
Rumex lacustris. Aquatic perennial, the solitary stout- 
ish very erect stem 2 or 3 feet high, more than half sub- 
mersed, this portion with only rootlets at the nodes, the 
internodes 4 to 6 inches long: jemersed parts very minutely 
scabrous-puberulent, and the leaf-surface also papillose- 
muriculate: leaves 2 inches long, on petioles of an inch or 
more: blade oblong or lanceolate, abruptly acute, or the 
uppermost tapering: inflorescence short and dense: penicil- 
lately multifid stigmas large and conspicuous: valves of the 
small fruit all grain-bearing, the grain not broader than the 
venulose entire margins. 
Silver Lake, Lassen Co., Calif., 830 July, 1894, Baker & 
Nutting. 
Spirea arbuscula. S. betulefolia, var. rosea, A. Gray, 
Proc. Am. Acad. viii. 381. S. lucida, var. rosea, Greene, 
Pitt. ii. 221. Bushes erect, parting above into many short 
divergent rigid branches, each with a small dense cymose 
corymb at the end: stem and branches red, shedding 
annually a thin bark: growing branches and leaves slightly 
puberulent: leaves 4-3? inch long, ovate or elliptical, sub- 
sessile, obtuse at both ends, usually sharply serrate except 
