Parr 4, 1908] ROSACEAE 369 
2. Drymocallis corymbosa Rydberg, sp. nov. 
Drymocalhs convallaria Rydb. Mem. N. Y. Bot, Gard. 1: 219, in part. 1900. 
Stem 3-8 dm. high, more or less glandular- or viscid-villous, branched above, with 
ascending branches; basal leaves pinnate, with 7-11 leaflets; petioles 2-10 cm. long, 
viscid-villous; upper leaflets broadly obovate, 3-5 cm. long, usually rounded at the apex, 
‘Sparingly short-hairy, especially on the veins, and glandular-atomiferous, coarsely and deeply 
doubly serrate with ovate teeth; lower leaflets more orbicular, more or less oblique and 
smaller; stem-leaves similar but short-petioled and with fewer and more acute leaflets ; 
stipules ovate, deeply toothed ; inflorescence many-flowered, rather dense, usually more or 
less flat-topped; hypanthium densely viscid-villous, in fruit about 1 cm, wide; bractlets 
linear or linear-lanceolate, 4-5mm. long; sepals ovate-lanceolate, acute, 5 mm. long, in fruit 
8 mm. long; petals white, broadly obovate, 5-6 mm. long; stamens about 25; anthers 
slightly cordate at the base; pistils numerous; styles fusiform. 
‘ Pe Pais in the Spanish Basin, Montana, in 1897, Rydberg & Bessey 4348 (herb. N. Y. 
ot. Gard.). 
DISTRIBUTION: Common in meadows from Athabasca and British Columbia to northern Col- 
orado and Washington. 
3. Drymocallis convallaria Rydb. Mem. Dep. Bot. Columbia 
Univ. 2: 193. 1898. 
Potentilla convaliaria Rydb. Bull. Torrey Club 24: 249, 1897. 
Stem tall, erect, 4-10 dm. high, long-villous but not very densely so, glandular or 
viscid, especially above, branched above, with long erect branches; stipules ovate or lance- 
olate, more or less toothed, about 1 cm. long; basal leaves several, with villous petioles 
5-10 cm. long, pinnate; leaflets 9-11, slightly long-pubescent or glabrate, the upper 3-5 
cm. long, rhombic-obovate and acute, coarsely serrate and incised with ovate teeth, the 
lower leaflets more ovate; stem-leaves with fewer more acutish leaflets; cyme with rather 
elongate upright branches, but with short pedicels, and therefore rather long and narrow; 
flowers 10-18 mm. in diameter; hypanthium densely glandular-viscid, villous, not much 
enlarged in fruit, 8-10 mm. in diameter; petals broadly obovate, white, turning yellow in 
drying, a little longer than the sepals; bractlets lanceolate, much smaller than the ovate- 
lanceolate sepals, which are about 5 mm. long in flower and 8 mm. in fruit; stanrens about 
25; anthers flat, slightly cordate at the base; pistils numerous. 
TYPE LOCALITY : Near Bozeman, Montana, 
DISTRIBUTION : Valleys from Montana to New Mexico, rather local. . . 
ILLUSTRATIONS: Bull. Torrey Club 24: f/. 306; Mem. Dep. Bot. Columbia Univ. 2: £1. 104. 
4. Drymocallis lactea (Greene) Rydberg. 
Potentilla glandulosa nevadensts S. Wats. Bot. Calif. 1: 178,in part. 1876. Not P. nevadensis 
Boiss. 1838 
Potentiila glandulosa lactea Greene, Fl. Fran. 65. 1891. 
Potentilla lactea Greene, Pittonia 3: 20. 1896... va he, 
Cespitose perennial; stem slender, 3-6 dm. high, finely pilose, but only slightly viscid ; 
stipules lanceolate, mostly entire; basal leaves pinnate, with about 9 leaflets; petioles 
2-5 cm. long, pilose; upper leaflets obovate, sparingly pubescent on the veins and very 
little glandular, 1.5-3 dm. long, usually rounded at the apex, more or less doubly serrate 
with ovate teeth; lower leaflets smaller and more rounded; stem-leaves reduced, with 3-7 
more acute leaflets; cyme with ascending branches; hypanthium densely pilose, in fruit 
6mm. wide; bractlets lanceolate, 2-3 mm. long; sepals lanceolate, acute, 4 mm. long, in 
fruit about 6 mm. long; petals obovate, white, about 5 mm. long; stamens 20-25 ; anthers 
slightly cordate at the base; pistils many. 
Typp LOCALITY: Fresno and Kern counties, California, : ; 
DISTRIBUTION : Meadows at middie elevations in the Sierra Nevada, California. 
