152 UNIVERSITY OF MISSOURI STUDIES [^94 



Common in low flats along streams and in glades. 

 Illinois to Missouri and Arkansas. 



476. M. coccinea (L.) Willd. [C coccinea L.]. Scarlet 



HAW. 



Rocky thickets and hawthorn glades; common and ex- 

 tremely variable, numerous forms connecting closely with 

 the next four species. 



Newfoundland to Manitoba; Florida to Texas. 



477. M. rotundifolia (Ehrh.) Daniels [C. rotundifolia 

 (Ehrh.) Borck.]. 



Ledges and hawthorn glades; infrequent. 

 Connecticut to Michigan; Florida to Alabama and Mis- 

 souri. 



478. M, macracantha (Lodd.) Wenzig. \C. macracantha 

 Lodd.: C. cocciftea macracatitlta (Lodd.) Dudl.]. 



Rare in thickets and glades. 



Quebec to Dakota; Virginia to Missouri. 



479. M. mollis (T. & G.) Daniels [C. mollis (T. & G.) 

 Scheele: C. coccinea mollis T. & G.]. Red haw. 



Very common in thickets, glades, bottoms, and in old 

 fields and along roadsides; very variable in foliage and fruit. 



Quebec to Michigan and South Dakota; Pennsylvania 

 and Tennessee to Louisiana and Texas. 



480. M. Biltmoreana (Beadle) Daniels [C Biltmoreana 

 Beadle]. Biltmore thorn. 



Rare in glades. 



Pennsylvania to Missouri; South Carolina to Alabama 

 and Tennessee. 



481. M. campestris (Britton) Daniels {C. campestris Brit- 

 ton], Prairie thorn. 



Abundant in the hawthorn glades north of Columbia. 

 There are forms connecting with the following three species. 

 Missouri and Kansas. 



482. M. tomentosa (L.) Ait. \C. toinentosa L.]. Gray 

 thorn. 



Common in thickets. This species intergrades with the 

 next. 



