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COULTER AND ROSE—-NORTH AMERICAN UMBELLIFERAE. 1438 
Specimens examined: 
Massacuusetts: On an island near Beverly, Torrey; Beverly Bay (no collector 
given), August, 1847. 
Maine: Cape Elizabeth, Boott, July 18, 1861; shores of Seal Harbor, Mount 
Desert, Redfield, August 1, 1890. 
New Brunswick: St. Anne, Allen, August 16, 1881; coast of Gaspé, Macoun 87, 
August 1, 1882. 
Nova Scotia: Ingonish, Cape Breton Island, Macoun 19120, August 3, 1898. 
Lasrapor: Dumpling Harbor, Mann, July 17, 1864; shore of Esquimaux River, 
Allen 48, July 27, 1882. 
This Coelopleurum is abundant in the region of the type locality of Michaux’s 
Ligusticum actaeifolium, associated with LL. scothicum L., which Michaux collected at 
the same station. Such a plant could hardly have escaped him, and he would nat- 
urally associate it with LL. scothicum, Besides, it is the only plant of the region 
which agrees with the original description of L. actaeifolium. Therefore, while we 
have not seen the type specimen, we feel justified in identifying Michaux’s plant as 
our Coelopleurum of the northeast coast, heretofore referred to the Alaskan C. gmelini. 
A form from the ‘‘rocky shore of the St. Lawrence, Temiscouata, Canada,’’ col- 
lected by Pringle, August 28, 1879, and represented only by a cluster of mature 
fruits, may possibly be C. actaeifolium, as the fruit has uniform ribs, but it is much 
larger, being 10 to 12 mm. long. It was mentioned in our Revision of 1888, but no 
new specimens have been received. 
44, OREOXIS Raf. Ser. Bull. Bot. 217. 9 1830. 
Calyx teeth prominent. Fruit globose, slightly flattened laterally 
if at all, glabrous or puberulent. Carpel with very thick and prom- 
inent equal corky ribs, each 
with a large group of strength- 
ening cells. Carpophore none. 
Stylopodium wanting. Oil 
tubes 1 to 3 in the very narrow 
intervals, 2 on the commissural 
side, and a small one in each 
dorsal rib. Seed sulcate be- 
neath the oil tubes, with flat 
or somewhat concave face. 
Alpine cespitose perennials, 
with pinnate leaves usually 
shorter than the peduncles, no 
involucre, and involucels of narrow bractlets equaling the yellow 
flowers. 
Type species, Oreoris humilis Rat. 
A genus of at least 2 species, belonging to the high mountains of 
Colorado and Utah, and probably New Mexico and Arizona. 
Glabrous, except perhaps in the umbel; oil tubes more than one in the intervals. 
Fie. 45.—Oreoxis humilis: a,b, « 8. 
Involucels linear................-----.-------------------------- 1. OJ humilis. 
Involucels conspicuous and toothed........-.----.---------------- 2. O. bakeri, 
Puberulent; oil tubes solitary in the intervals .....-..-.------------- 9. O. alpina, 
1. Oreoxis humilis Raf. Ser. Bull. Bot. 217. 1830. Fic. 45. 
Glabrous (sometimes slightly puberulent just below umbel), cespi- 
