62 



heretofore known for it is in Wayne Co., Western New York, 

 where it has been collected by E. L. Hankerson. Mr. Farwell 

 writes: *' I first collected it in 1884 in a swamp between the 

 Osceola and Calumet mines in Houghton Co., about twelve or 

 thirteen miles from here, where it was very plentiful. I collected 

 it again about six miles northwest of here, in Keweenaw Co., in 



F 



1887." C. exilis is a rare species, and this extension of range is 



important. 



This region, in common with our whole northern boundary 

 apparently, presents the most perplexing similarities in some of 

 the varities of C. tribuloides, C. scoparia, and C. straminea. 



The list comprises sixty-four entries. Following each entry, 

 I have inserted the number which it bears upon Mr. Farwell's 



label. 



C. paiicijiora, Lightf 519. 



C. Michanxiana^ Bocckl. 664, 665. Frequent in meadows. 



C, intiimescens^ Rudge. 614. Common. 



C. oligospcrma^ Michx. 661. Frequent. 



C. utriciilata, Boott, 66^, 663a, 663b, 714, 714b. Common. 



C. utricidata^ Boott, var. minor ^ Boott, 714a, 715, 715^- 



C. monile^ Tuckm. 662, 716, 716a, 716b. 



C. retrorsa^ Schw. 609, 689. Common. 



C. Inrida, Wahl. i^C. tentaculaia, Muhl.) 703. Frequent. 



C. hystricina, Muhl. 634, 688. 



C. squarrosa, Linn. 699. Frequent 



C. scabrata^ Schw. 651. Common. 



C, Houghtonii^ Torn ^'^l^ 633. 



C. filiformis, Linn. 640. Frequent. 



C. fusca, All. 615. 



C, stricta. Lam, 569, 565a, 566, 566a, 566b, 566c. Frequent. 

 C. stricta X JilifonniSj Bailey, 613. The only station known for 



this well-marked hybrid. 

 C, crinita. Lam. 569, 568, 568a, 568b. 

 C. Magellanica, Lam. 608. 

 C, limosa^ Linn. 606, 607- 



■ 



C. virescens^ Muhl var. costata, Dewey, 697. 

 C. casianea^ Wahl. 611. ^ 

 C. arctata, Boott, 610. 



