or silicate back, and face with a broad shallov/ concavity and cen- 
tral longitudinal ridge. (Fig. 90 .) 
Common in the mountains of Colorado, and extending into Utah 
{Ward), N. Arizona {Palmer 176, Lemmon 393, Rushy 630), and New 
Mexico {Big eloiv, Walcott, Rushy). FI. June to August. This is iJaW tC- 
Harbour 218. 
So far as we can discover, this species does not occur outside of the 
Eocky Mountains, and chiefly in Colorado, even the range widely separat- 
ing it from L. apiifolium, with which it has often been confused. Certain 
Colorado forms, commonly referred to this species, are Conioselinum 
Canadense. In som«.. cases the fruit is necessary to distinguish these 
species. Collectors should carefully note whether any so-called specimens 
of L. scopulorum develop fruit with lateral wings. 
4. L. Porteri. Rather stout, 2 to 8 feet high, more leafy, 
with glabrous or puberulent inflorescence: leaves large, biternate 
then bipinnate; the numerous rather crowded segments lanceolate 
to lanceolate-ovate, laciniately pinnatifid, toothed or entire: umbel 
of numerous rays, mostly with neither involuere nor involucels; 
rays (fruiting) 1 to 2 inches long; pedicels 3 to 4 lines long; 
flowers white or pinkish: fruit (immature) oblong-ovate, 2 lines 
long, with more prominent winged ribs than in other species: oil- 
tubes 4 to 6 in the intervals, 8 to 10 on the commissural side: seed 
somewhat dorsally flattened, with very sharply angled back, and 
face with a broad shallow concavity and central longitudinal ridge. 
In the mountains and foothill* of Colorado, Bear Creek (Vasey 223, in 
1868), he8.dwater» of Platte Eiver {Coulter, in 1873, distribed as L. apiifol- 
ium, and described as such in FI. Colorado); Arizona {Palmer 176, in 1877), 
Huachuca Mts. {Pringle, in 1884, distributed as L. ftlic/inum)', New Mexico, 
mountains near Las Vegas {O. R. Vasey, in 1881, distributed as L. apiifol- 
ium), near top of mesa, Eaton {Tracy 52, in 1887). FI. June and July. 
This is also the Colorado form referred doubtfully to L. apiifolium by 
Brewer & Watson in Bot. Calif, i. 264. It is a curious fact that this species 
has always been referred to L. apiifolium or L. filicinum, two species with 
which it cannot be confounded, and has never been referred to L- sccpu- 
lorum, to which it is most nearly allied. It differs from that species chiefly 
in its more leafy habit, more numerous crowded smaller and narrower leaf- 
segments, naked often glabrous umbels, more ovate fruit, which is more 
prominently winge. I than in any other species, more numerous oil-tubes, 
and seed with a very sharply angled back. 
^ 5. L. Canbyi. Stem about 2 feet high, leafy at base, with 
a small cauline leaf or two, and glabrous inflorescence: leaves 
large, biternate; leaflets lanceolate, 3 to 4 inches long, pinnately 
