902 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Specimens examined : 
TIpano: Type specimens as cited under type locality. 
Wasuinaron: Basaltie cliffs, Wawawai, Whitman County, Piper 2782, April 17, 
1897. 
10, Leptotaenia leibergi C. & R., sp. nov. Puate VII. 
Low caulescent plants from rather large shallow tuberous roots; 
peduncles elongated, 15 to 25 em, long, erect or somewhat spreading, 
glabrous; leaves ternately dissected, the ultimate segments linear, + to 
8mm. long; flowering umbels very much contracted; fruiting umbels 
‘ather irregular, with no involucre, and involucels of 8 or 4 small 
bractlets; longer rays 3 cm. long; pedicels 4 to 6 mm. long: flowers 
deep yellow; fruit oblong, 6 to 8 mm. long, 4 mm. broad, with filiform 
dorsal and intermediate ribs, and narrow rather thickish laterals: oil 
tubes indistinet, perhaps solitary in the intervals, and 2 on the com- 
missural side. 
Type locality, wet adobe soils of Barren Valley, Malheur County, 
Oregon, where it is said to be common; collected by Leberg, no. 219%, 
June, 1896; type in U. S. Nat. Herb. 
Only known from the type locality. 
Specimens examined : 
Orecon: Type specimens as cited under type locality. 
EXPLANATION OF PLATE VII.—Fig. a, dorsal view of carpel. 
11. Leptotaenia minor Rose; Howell, Fl. N. W. Am. 2: 251. 1898. 
Acaulescent or nearly so, glabrous throughout, from large branch- 
ing and somewhat starchy roots; leaves 15 to 20 em, long (including 
the petiole), finely dissected, with short linear acute ultimate segments 
and an inconspicuous stipular sheath; peduncle thick and turgid, 
especially at maturity, 15 to 20 cm, long, somewhat glaucous; umbel 
unequally-rayed, with no involucre, and involucels of several linear 
bractlets; rays 2 to 6 cm. long; pedicels 10 to 14 mm. long; flowers 
light purple; fruit oblong, 14 to 16 mm. long, 5 to 7mm. wide; oil 
tubes 1 or 2 in the intervals, not conspicuous. 
Type locality, near Rock Creek, Morrow County, *‘dohn Day 
Country, Oregon,” altitude 1,040 meters; collected by Leberg, no. 
98, May 22, 1894; type in U.S, Nat. Herb. 
Eastern Oregon. 
Specimens examined: . 
OreGon: Type specimens as cited under type locality; Lost Valley, Howell 414, 
May, 1882; near Antelope, /Tomell 421, May 10, 1885. 
EXPLANATION OF PLATE VIII.—Fig. a, dorsal view of carpel; b, enlarged view of tip of leaf, 
Howell 414, from Lost Valley, was distributed as LZ. purpurea, and seems to have 
been included by Watson in his original description of that species. 
In habit this species much resembles L. purpurea, but the leaflets are much shorter, 
the fruit is very different, while it lacks the large purple sheathing bracts at the base 
of the stem. The fruit is more like that of LZ. watsoni and LL. salmoniflora, but is very 
distinct from either. 
