Chrysoplenium Saxifragaceae 519 



1. Mitella diphylla L. Bishopscap. Map 1075. Infrequent to frequent 

 probably throughout the state although there are no records from the 

 southwestern counties. It is found in moist or wet soil, usually on wooded 

 slopes, especially on the steep slopes of deep ravines, and more rarely in 

 flat woods. 



Que. to Minn., southw. to N. C, Mo., and Iowa. 



3199. CHRYSOSPLENIUM [Tourn.] L. 



1. Chrysosplenium americanum Schwein. Golden Saxifrage. Map 

 1076. I found this species as a common plant in shaded woodland in cool, 

 shallow water slowly moving through a depression in the woods, and also 

 in adjacent pools of water in Porter County along the traction line north 

 of Willis Stop. It has been reported from Lake, Marshall (Nieuwland re- 

 ported it as found by Clark, but Clark did not report it in his list of plants 

 in "Lake Maxinkuckee" by Evermann & Clark), Porter, and St. Joseph 

 Counties. It is, no doubt, local in its distribution because of its peculiar 

 habitat ; however, since the plant is so inconspicuous, it may be more fre- 

 quent than the reports indicate. 



N. S. to Sask., southw. to Ga., Ohio, and Minn. 



3203. PARNASSIA [Tourn.] L. 



1. Parnassia glauca Raf. (See Bartonia 17:18. 1935.) (Parnassia caro- 

 liniana of Gray, Man., ed. 7 and Britton and Brown, Illus. Flora, ed. 2, 

 not Michx.) Map 1077. This species is found only in wet, marly areas 

 about lakes and in the outlets of springs. It is almost invariably associated 

 with Lobelia Kalmil Infrequent to frequent throughout the lake area, 

 becoming rare or absent in the southern part of the state. 



N. B. to Man., southw. to N. J., Pa., and Iowa. 



3208. PHILADELPHIA L. Mockorange 

 Flowers racemose, 5-7, fragrant; calyx lobes acuminate, 12-15 mm long. (See excluded 



species no. 286, p. 1055.) p - ooronarius. 



Flowers 1-3, usually solitary, inodorous; calyx lobes acute. 



Calyx lobes about twice as long as the tube, 8-10 mm long. (See excluded species 



' no. 287, p. 1056.) p - grandiflorus. 



Calyx lobes about equaling the tube, about 7 mm long. (See excluded species no. 

 ' 288, p. 1056.) p - inodorus. 



3217. HYDRANGEA L. Hydrangea 



[St. John. A critical revision of Hydrangea arborescens. Rhodora 23: 

 203-208. 1921.] 



Lower surface of leaves more or less pubescent on the principal nerves; blades cordate, 

 rounded, or tapering at the base. 

 Blades cordate or rounded at the base. 



Corymbs without sterile flowers, or with only a few of them 1. H. arborescens. 



Corymbs with all the flowers sterile la. H. arborescens var. sterilis. 



Blades tapering at the base lb. H. arborescens var. oblonga. 



Lower surface of leaves pubescent over the entire surface, the pubescence more or less 

 dense but not tomentose lc. H. arborescens var. Deamii. 



