NEW PLANTS FROM NORTH DAKOTA 237 
numerous. Bracts of the involucre lanceolate, long-acuminate, 
spreading, in two series, or all having nearly the same length, 
with long spreading white hairs on the margin and the sur- 
face of the lower half, on the ag margin short-ciliate. Rays 
13-20, 114 cm. long, 7 mm. 
his species is related bes H. tuberosus L., which is larger 
in all its parts, with long-petioled leaves; its rays are 3 cm. 
long, 1 cm. wide. 
The plant grows in rich, moist soil in ravines or other 
REGNA y localities in central North Dakota, and the type was 
collected by myself at Butte, N. Dakota, on August 5, 1906. 
Helianthus nitidus var. camporum, var. nov. 
Lamina folii inferior scabra. 
Leaves scabrous beneath. 
Not rare on the open prairie. Collected at Leeds, on Sept. 
8, 1910. 
Helianthus apricus sp. nov. 
nnis. Rhizoma crassum, tuberosum. Caulis 6-7 dm. 
altus, scaber, apice albo-strigoso, simplex vel in axillis super- 
ioribus sparsim ramosus. Folia lanceolata vel anguste ovato- 
lanceolata, firma, plana, lamina superiore scabra, inferiore 
albo-strigosa, juxta basim 3-nervata, extremitatibus "n 
angustata, apice acuto, breviter petiolata, MEC en tet D 
centibus serrulata, 2-7 cm. longa, 5-22 mm. lata (relatione 
plerumque 3: 1), opposita vel superiorum mm alternata. Pet- 
ioli cauli proxime ciliati, inter oppositos quasi connati. Invo- 
lucra solitaria vel pauca, 5-6 cm. diametro. Bracteae lance-. 
olatae, longe acuminatae, divaricatae, conferte pubescentes, 
gine inferiore ciliis longis, albis vestitae. Flores radiati 
15- 0. 
. Perennial, with fleshy, thickened, tuber-bearing rootstocks. 
Stem 6-7 dm. high, scabrous, white-strigose at the top, simple 
- or with few branches in the upper axils, and one head at the 
3 end.of each branch. Leaves lanceolate or narrowly ovate- 
— lanceolate, firm, flat, scabrous above, strigose white-hairy 
M .. beneath, 3-nerved near the base, narrowed at both ends, with 
a acute apex, short-petioled, serulate with thickened margins, 
27 hag long, ies oe wide, reri in the proportion of three 
E as | menia or 1-5 of the upperm 
E era. Petioles ciliate Xy rog proximal end, seil ut a con- 
nate when opposite. Heads single or few, 5-6 cm. in diameter. 
ivolucral bracts in two rows, lanceolat ate, tae te ace 
reading, with appressed pubescence, and margined below 
middle with white, long, spreading hairs. 'Rays, 15-20. 
Among related plants H. subtuberosus Bourgeau, has 
Pau. a lanceolate, scabrous beneath and four times as 
