924 



COMPOSITAE 



Solidago 



50 



Map 2019 



Solidago patula Muhl. 



50 



Map 2020 



Solidago ulmifolia Muhl. 



Lake, Elkhart County. In 1935 I again collected it under my no. 56864. 

 This form covered an area about 50 feet wide and 125 feet long. It was 

 associated with a thick stand of Solidago caesia which covered an acre 

 or more. The leaves of this form are on distinct short petioles, the base 

 rounded, the teeth of the margin fewer and wide apart, the blades dis- 

 tinctly much longer than in the typical form. It has been suggested to me 

 by a student of the genus as a possible hybrid of Solidago caesia and 

 Solidago ulmifolia. 



N. S. to Minn., southw. to Ga. and Tex. 



17. Solidago rugosa Mill. Map 2021. Infrequent in the lake area and 

 local south of it. In the northern part of the state it is found mostly on the 

 wet or moist borders of lakes, bogs, and marshes. In the southern part it 

 grows in wet woodland. 



It is to be noted that Indiana plants differ from that shown in plate 426 

 of Rhodora, 1938. The leaves of our plants are not oblanceolate but are of 

 a lanceolate, ovate, or elliptic type and the surface is more or less rugose 

 both above and beneath. The pubescence of the upper surface of the leaves 

 is sparse and consists of simple, short, stout, colorless, conical hairs, arising 

 from a papillose base and is usually more or less appressed. The pubes- 

 cence of plants I have seen from New England consists of multicellular, 

 flattened trichomes similar to those of Solidago ulmifolia and the surface of 

 the leaves is not conspicuously rugose. The trichomes of the New England 

 plants arise mostly from veinlets while ours arise mostly from the spaces 

 enclosed by the veinlets. The blades of Indiana plants are usually thick 

 while those of New England plants are thin. 



Newf. to Ont, southw. to Va. and La. 



17a. Solidago rugosa var. aspera (Ait.) Fern. (Rhodora 17: 7. 1915.) 

 Map 2022. This variety has a limited distribution in the state and has much 

 the same habitats as the species but grows in slightly drier soil. 



Most authors define the specific name of this species as "wrinkled." As 

 I understand this definition, the axis of the wrinkle would be longer than 



