ioo Muhlenbergia, Volume 5 



STUDIES IN TRIFOLIUM IV. 

 By P. Beveridge Kennedy 



The group that we shall term the latifoliiim group is a seg- 

 regate from that large section of perennial clovers found grow- 

 ing in the Rocky mountains region or west of it. They are 

 essentially plants of mountain ranges and meadows, often enter- 

 ing into the composition of the wild or native hay. The pub- 

 lished names that we shall consider in the group are: 

 T. Aitonii Rydb. T. longipes var. latifolium Hook. 



T. Covillei House T. orbiculatum Ken. & McDer. 



T. Haydeni Porter T. oreganum Howell 



T. latifolium (Hook.) Greene T. multipedunculatum Kennedy 

 T. longipes var. pygmeum Gray T. shastense House 



Trifolium latifolium (Hook.) Greene, Pittonia 3: 223. 1897. 



T. longipes var. latifoliiim Hook, in Loud. Journ. Bot. 6: 

 209. 1847. 



T. Aitonii Rydb. Bull. Torr. Club, 34: 46. 1907. 



T. orbiculatum Kenned} - & McDermott, Muhlenbergia 3: 

 8. 1907. 



The original plant, on which all the other species in the 

 group are based, has never been adequately described. Hcoker, 

 at the place cited above, has 



"Foliis majoribus fere late ovatis subrhomboidisve." 



"Hab. Open pine-woods on the undulating ridge of Coeur 

 d'Alene mountains; near St. Joseph's (11. 659) [Geyer]. — In the 

 variety the leaves are very broad, and the plant assumes much 

 the character of T. repens: but the calyces are always hairy, and 

 the segments much longer and narrower." 



Greene, in Pittonia 3: 223, gives the variety specific rank 

 and says: "This plant, now abundantly represented in the her- 

 baria, shows no tracts of intergrading with T. longipes, from 

 which its low stature, not at all elongated peduncles, its broad 

 short leaflets, and distinctly pedicellate flowers all deflexed in 

 age, thoroughly and specifically distinguish it." 



We have not seen the original collection, n. 659 of Geyer, 

 but we have several specimens which we consider typical. A 



