Igrt] NELSON—IDAHO PLANTS 263 
This fragment is no. 217 in MACBRIDE’s series. He will try to secure the plant 
in quantity in rort. 
Thelypodium milleflorum, n. sp.—Tall, branching, wholly 
glabrous, biennial, 1-2 m. high, the stout main axis and the much 
slenderer ascending branches a deep purple below, becoming paler 
upward: leaves coarsely and irregularly dentate to entire, passing 
from oblong below to linear above; the lower petioles 6~r15 cm. 
long, usually shorter than the blades, becoming shorter upward: 
inflorescence greatly crowded, at length very long (that of the 
main axis often 4-6 dm.) but even in fruit quite dense: flowers, 
pedicels, and even the rachis very pale or milky white: sepals 
narrowly oblong-linear, slightly cucullate and greenish at the tip, 
about 5 mm. long: petals very narrow, twice as long as the sepals; 
the spreading blade nearly linear: the clawlike portion filiform but 
distinctly expanding again near the base: filaments at length well 
exserted, and the purple, linear, scarcely sagittate anthers coiled: 
pods a pure green, in good contrast with the pale pedicels and rachis, 
almost filiform, 6-10 cm. long, normally strongly ascending or 
suberect, but often irregularly spreading as if from their weight: 
stipe 2-3 mm. long; the style about the same length: the ascending 
pedicels a little longer than the stipes. 
This is T. Jaciniatum Endl. in part, some specimens being found in herbaria 
under that name. That species differs from this in many ways, but notice- 
ably its shabitat (on rocks), its smaller size, its laciniate leaves, its shorter, 
thicker, spreading pods, and opener inflorescence with green pedicels and 
rachis. 
The best specimens are MACBRIDE 234, New Plymouth, Idaho; abundant 
in rich soils on open slopes; in May, and by June in full fruit. It is also rep- 
resented by Cusick 1955, from dry bottom lands, Malheur Co., Oregon; 
AKER 1020, Eagle Valley, Ormsby Co., Nevada; CorTon 391, Yakima region, 
Washington. 
Rorrpa patusrris (L.) Bess.—In studying MAcBRIDE’s col- 
lections, I found a variation of this widely dispersed species that is 
quite noteworthy. This led to an examination of all the available 
Specimens at hand, as well as of those representing what we have 
been calling R. hispida (Desv.) Brit. In this study it became 
evident that MAcBRIDE’s specimens have the size, habit, and 
general aspect, and the perfect glabrateness of R. palustris, but 
