92 POETULAOACEiE. oreobhoma. 



long oblanoeolate, deep rose-color with orange stripe in the centre : stam- 

 ens about 7, filaments dilated below, coherent in a tube around the 2-4- 

 parted style capsule obscurely 2-4 valved, 12-20 ovuled. On high 

 exposed peaks of syenitic rock near Preston's peak, Siskiyou Moimtains. 



0. Howellli Howell 1. c. Calandrinia HowelUi Watson I.e. xxiU,f6S. 

 Leaves flat, oblong to ovate, attenuate to a margined petiole, 5-7 lines 

 wide, with narrow hyaline crisped margins : stems 4-6 inches high with 

 one or two pairs of bracts below the short racemose cymes : sepals l}^-2 

 lines long, orbicular to broadly ovate : petals 7-10, oblong-oblanceolate, 

 emarginate or entire, 6-8 lines long, deep rose-color, stamens 7. On high 

 exposed ridges, Josephine county, southwestern Oregon. 



* * Long thick root branching below : the 2-3-divided caudex not 

 reaching the surface of the ground : nerves of the calyx excurrent, but 

 not gland-tipped : stems terminating in a few-flowered umbel. 



0. oppositlfolia Howell I.e. Calandrinia oppositifolia Watson. Badical 

 leaves linear-oblanceolate, attenuate to the scarious-margined subterra- 

 nean base 13^-3 inches long : the lower cauline 1-3 pairs, opposite and 

 similar with 'occasion ally scattered entire bracts above: stems 5-10 in-ches 

 high bearing a terminal 1-5 flowered umbel : flowers white or pale 

 pink on elongated pedicels 1-3 inches long: sepals orbicular, 2-3' lines 

 long: petals 10,6-10 lines It.ng: stam^ens8-12 or more : style deeply 3- 

 cleft : capsule oblong, 3 lines long, 5-10-seeded. On wet hillsides about 

 Waldo, Josephine county, Oregon, flowering in April and May. 



0. Tweedyi Howell 1. c. Calandrinia Tweedyi Gray Proc. Am. Acad. 

 xxii, S77. Oaudex and root very thick : leaves obovate fleshy 2-4 inches 

 long, an inch or two wide, scapes a little longer than the leaves 1-3 flow- 

 ered : sepals and bracts entire, the former orbicular : petals an inch long : 

 stamens 10-11 : capsule 20-30-seeded : seeds with a large and loose orbicu- 

 lar arillus. Wenatchee Mountains, Washington, alpine. 



* * * Root fusiform or conical ; wholly underground : scapes 1-3- 

 flowered, not surpassing the radical leaves. 



0. pygmaea Howell 1. c. 33. Talinum pygmmum Oray Sillim. Journ. 

 xxriii, 407. Leaves narrowly lanceolate or linear 1-2 inches long, with 

 broad scarious margined underground petioles : bracts scarious glandular- 

 ciliate: sepals orbicular, glandular-dentate 2 lines long: petals" red, 

 about twice-the length of the sepals : capsule obtuse, nearly equalling the 

 calyx, 16-20-seeded. On Mount Adams, Washington to the Rocky Mount- 

 altins, Nevada and California. 



0. Nevadensls Howell 1. c. Calandrinia Nevadensis Oray Leaves 

 inear 2-4 inches long by a line or two wide, the underground portion di- 

 lated, scapes 1-3 inches high with a pair of foliaceouslinear bracts near 

 the middle 1-3 flowered: sepals ovoid, more or less apiculate entire, 3-4 

 lines.long: petals 3-10 white, twice as long as the sepals: capsule ellip- 

 tical, a little longer thanthecajyx: ovules 3-50. Wet alpine meadows 

 and rivulets, Washington to California and Nevada. 



» * * * Root glandular, comparatively deep-seated : radical leaves 

 few or none: scape-like stems with a pair (or sometimes 3 or 4 in a 

 flowered" °PP°'''^ ^^^^^ ^'"®^'" ^^'^^^^ near the middle: several- 



0. triphylla Howell 1. c. Claytonia triphylla Watson I c x SM. 

 Stems 1-3 inches high: radical leaves, when present, narrowly anceola4 

 to Imear 6-12 lines long ; cauhne 1-4 in a whorl narrowly lanceolate at- 

 tenuate below : 1-2 inches long inflorescence a several^owered Wteate 

 umbel: bracts minute: petals oblong, 2 lines long exceeSgtL rounded 

 sepals. In wet places on high mountains, California, to Br t. Gollmbk 



