Tauschia bicolor Constance & Bye sp. nov. 
Plantae brevi-caulescentes acaulescentesve glabrae, 
‘caulibus gracilibus 10-40 cm. altis e caudice gracili: folia 
basalia rosulata triangulari-ovata vel ovata 1.5-8 cm. 
longa, 2-6 cm. lata, profunde trilobata vel ternata vel 
imparipinnata foliolis 1—8-partibus late ovalibus vel an- 
guste oblongis serratis lobatisque vel pinnatifidis, superne 
cinereis, inferne purpureis; petioli anguste vaginantes 
1.5-10(-25) em. longi; folia caulina pauca; pedunculi 
graciles 7-20 cm. longi; involucrum plerumque nullum: 
radii 8-12 eis exterioribus fertilibus 5-11 mm. longis: 
involucellum dimidiatum bracteolis 8-5 linearibus acutis 
1-3 mm. longis; pedicelli crassi 1-2 mm. longi fructo 
centrali saepe subsesseli; flores purpurei, petalis intus 
albis extus purpureis; stylopodium nullum, stylis valde 
gracilibus; carpophorum bipartitum dimidiis_ bifidis; 
fructus ovoideus apice truncatus basi rotundatus, glaber, 
2.5-8 mm. longus, 2 mm. latus, costis filiformibus acutis 
quam intervallis multo angustioribus; vittae in interval- 
lis plures in commissuris 2; seminum superficies plana; 
chromosomatum numerus 7 = 22. 
Plants rather slender, short-caulescent to acaulescent, 
the stems slender, 1 or 2, 10-40 cm. high from a slender 
rootstock, glabrous; basal leaves rosulate, triangular- 
ovate to ovate, 1.5-8 cm. long, 2-6 cm. broad, deeply 
3-lobed or ternate to pinnate with 1-8 pairs of broadly 
oval to narrowly oblong, serrate and lobed to pinnatifid 
leaflets 8-30 mm. long, 8-30 mm. broad, ashy-pale above, 
purplish beneath; petioles 1.5-10(—25) em. long, nar- 
rowly sheathing; cauline leaves few, reduced upward: 
peduncles terminal, slender, 7-20 cm. long: involucre 
of a linear bract or usually 0; rays 8-12, 5-11 mm. long, 
apparently only the outer fertile: involucel dimidiate, 
the bractlets 3—5, linear, acute, 1-8 mm. long; pedicels 
stout, 1-2 mm. long, the central fruit often subsessile ; 
[ 229 ] 
