Ascyrum 



Hypericaceae 



671 



50 



Map 1401 



Hibiscus Tnonum L. 



species. A specimen reported from Parke County by Grimes is in the 

 herbarium of DePauw University and is Hibiscus palustris. 

 Ind. to Mo., southw. to Fla. and Tex. 



5. Hibiscus trionum L. Flower-of-an-hour. Map 1401. An obnox- 

 ious weed in rather sandy soil in cultivated grounds in many parts of the 

 state, especially in the glaciated area. I can recall the time when I rarely 

 saw it but now in certain areas it forms a complete stand in cornfields. 

 Although it is an annual, when once established, it is difficult to extermi- 

 nate on account of its numerous seeds and their unusual viability. 



Nat. of Eu. ; N. S. to S. Dak., southw. to Fla. and Kans. 



187. HYPERICACEAE Lindl. St. Johnswort Family 



Sepals 4, the outer two very much larger and bractlike; petals 4 



5167. Ascyrum, p. 671. 



Sepals 5; petals 5 5168. Hypericum, p. 671. 



5167. ASCYRUM L. 



1. Ascyrum hypericoides L. var. multicaule (Michx.) Fern. (Rhodora 

 38:433. 1936.) (Ascyrum hypericoides of authors.) St. Andrew's Cross. 

 Map 1402. Usually in poor soil on open black and white oak ridges and 

 rarely elsewhere. I have one specimen collected in an old fallow field. 

 Infrequent. 



Mass. to Nebr. ; southw. to Fla. and Tex. 



5168. HYPERICUM [Tourn.] L. St. Johnswort 



Petals yellow, convolute in the bud. 

 Styles 5; capsules 5-celled. 



Tall perennials; leaves mostly 4-8 cm long; flowers generally 4-5 cm wide; cap- 

 sules 1.7-2.5 cm long 1. H. Ascyron. 



Shrubs, usually 4-7 dm high; leaves mostly 2.5-4.5 cm long; flowers 2-2.5 cm wide; 

 capsules 6-9 mm long 2. H. Kalmianum. 



