162 CERATOI'HYLLACEAE. 



Under pines in the seaward North Coast Ranges: Mill Valley; San Ra- 

 t.nl. Henry Edwards, 1878; Mendocino and northward. Rare. 



8. M. linearis (Dougl.) Greene. Annual, nearly simple or very much 

 branched, erect, 3 to 6 in. high; leaves alternate, narrowly linear (1 to 2% 

 in. long and 1 line wide), sessile by a clasping base; racemes commonly se- 

 cund, about 6 to 8-flowered; pedicels in fruit spreading or recurved, 2 to 5 

 lines long; sepals broad and rounded or almost truncate, nearly or quite 2 

 lines long, white-margined; petals white, obviously unequal, narrowly obovate, 

 narrowed at base or clawed, slightly united on one side and not on other side; 

 stamens 3, inserted on the very base of the petals; ovules 3; seed lenticular 

 nearly or quite 1 line broad, smooth and shining, finely reticulated under a 

 lens. — (Claytonia linearis Dougl.) 



Coast Ranges: Las Trampas, Contra Costa Co., Hall; Napa Valley, ace. to 

 Bigelow, 1854. Sierra Nevada. 



9. M. fontana L. Water Montia. Annual, or sub-perennial by rooting 

 ;it the nodes; stems slender 2 to 6 in. long, ascending or procumbent; leaves 

 opposite, narrowly oblanceolate or oblong, somewhat connate at base; petals 

 minute, white, unequal, united at base, and exceeding little the calyx; seeds 

 minute, roughened. 



Growing along the margin of small surface streams or in muddy places. 

 Marin Co. to Napa Co., northward to British Columbia and far across the 

 continent. Mar.-May. 



5. CALYPTRIDIUM Nutt. 



Depressed and rather succulent herbs with alternate spatnlate leaves and 

 small ephemeral flowers in solitary or clustered scorpioid spikes. Sepals 2, 

 Bcarious or searious-margined, orbicular, emarginate at apex and base. Petals 

 in ours 4, obovate; stamens 1, 2 or 3, twice the length of the petals. Style 

 simple; stigmas 2. Capsule membranaceous, globose-ovate, 2-valved, few to 

 many-seeded. (From Greek kaluptra, a calyptra, the petals closing over each 

 other and carried up on the capsule.) 



Stamens 1, 2, or 3, shorter than the petals; style very short or almost none 



1. C. quadripctalum. 

 Stamens 3, twice as long as the petals; style very long, filiform 2. C. umbellatum. 



1. C. quadripetalum Wats. About 9. in. high; branches erect from a de- 

 cumbent base, leafy up to the short dense spikes; Leaves oblong-spatulate, 2 

 in. long or less, including the tapering petiole; sepals round-reniform, white- 

 scarious and rose-tinged with greenish center, 2 to 4 lines broad, exceeding 

 the 4 petals; capsule oblong-oval, 1<> to 20-seeded, little or not at all Bur- 

 passing the fruiting calyx. 



Geysers, Sonoma Co.j Lake Co.; Bel River, northern Lake Co. 



2. C. umbellatum (Torr.) Greene. Pussy Paws. Radical leaves spatn- 

 late in a dense rosette; peduncles 1 to 7 in. high; sepals wholly scarious or 

 with a mere greenish center, emarginate at apex and base, equal; petals 4, ob- 

 ovate; 2 stamens opposite petals, the third alternate, these and the long styles 

 asserted; capsule globose-obovate, few-seeded. 



Humboldl Co.; Sierra Nevada. June-Sept. 



CERATOPHYLLACEAE. HoRNWORT Family. 

 A.quatic submerged fragile herbs, with cylindric jointed stems and whorled 

 sessile exstipulate Leaves eul into filiform divisions. Flowers minute, axillary, 

 monoecious, without perianth but surrounded by an s to 12-cleft persistent 



