36 Muhlenbergia, Volume 5 



A NEW CONIOSELINUM 

 By George E. Osterhout 



Since my article "The Colorado Conioselinum" was pub- 

 lished in Muhlenbergia 4: 108. 1909, I have discovered that 

 I made a mistake in assigning this Conioselinum to C. scopu- 

 lorum (Gray) C. & R. I have since received some material 

 which in every way answers the description of C. scopnlornm, 

 and for the Conioselinum of northern Colorado, of which I was 

 writing, a description is therefore proposed. 



Conioselinum coloraclense sp. nov. 



Stem 5 to 6 dm. high from a perennial root, often glaucous, 

 and for the most part carrying three leaves whose ample bases 

 sheath the stem, the umbel or umbels rising from the sheath of 

 the upper leaf: the lower leaves usually biternate and the upper 

 ternate, then pinnate, the segments of the leaflets narrowly ovate 

 or "oblong, laciniately lobed and pointed: the umbel rather small 

 with involucre of few scarious bracts, and involucels of similar 

 smaller bracts: the rays usually 10 or 12, slightly scabrous, 2 or 

 3 cm. long, the pedicels 5 to 8 mm. long: florets white: fruit nar- 

 rowly ovate, 5 to 6 mm. long, the dorsal ribs rather close together 

 and narrower than the lateral wings: oil tubes 2 to 5 in the in- 

 tervals and 6 to 8 on the commissure. 



From this description it will be seen that Conioselinum col- 

 oraclense is quite different from C. scqpulorum. In appearance 

 I suppose it closely resembles Lignsticnm simulans C. & R. 

 The type locality of C. scopulorum is in New Mexico, and it 

 may be confined to territory south of northern Colorado. C. col- 

 oradense is quite common along streams and in springy places 

 in the mountains of northern Colorado and southern Wyoming. 

 My type specimens were collected at Chamber's Lake, Larimer 

 county, Colorado, September 13, 1907, no. 3659. I have it also 

 from Moraine Park, Larimer county, and C. F. Baker's no. 895 

 collected at Marshall Pass, August 20, 1901, is this species. 



\«u Windsor, < loloradd, 



