850 



SCROPHULARIACEAE 



Besseya 



50 



Map 1851 



Jesseya 



(Eaton) Rydb. 



50 



Map 1852 



Dasistoma macrophylla (Nutt.) Raf. 



7583A. BESSEYA Rydb. 



1. Besseya Bullii (Eaton) Rydb. (Synthyris Bullii (Eaton) Heller.) 

 Map 1851. Very local. Usually only one or a few plants are found at a 

 place. Seemingly it prefers a slightly acid and gravelly soil and is found 

 on or near the brink of high, gravelly banks of streams. In White County 

 I found it on the east bank of the Tippecanoe River about a mile northeast 

 of Buffalo, where scattered plants were found for about 50 feet and asso- 

 ciated with Berberis canadensis and Pedicularis canadensis. Both this 

 species and the Berberis were restricted to the edge of the bank. 



S. Mich, to s. Minn., southw. to s. Ohio, 111., and Iowa. 



7602. DASf STOMA Raf. 



1. Dasistoma macrophylla (Nutt.) Raf. (Seymeria macrophylla Nutt., 

 and Afzelia macrophylla (Nutt.) Ktze.) Map 1852. Infrequent to frequent 

 except in the northern counties, where it is rare or absent. This is a 

 woodland species found principally in dry soil along streams. It is a coarse 

 perennial usually turning black on drying and soon beginning to disinte- 

 grate so that specimens more than twenty years old become very brittle. 

 The largest plant I have seen was 7 feet high, and another large plant 

 was 6 feet high with a lower side branch 4 feet long. 



Ohio to Nebr., southw. to n. Ala. and ne. Tex. 



7604. GERARDIA L. Gerardia 



Pedicels, in flower, mostly shorter or 1-2 'times as long as the calyx. 

 Calyx lobes short and acuminate, 0.5-2 mm long, usually about 1 mm long; sinuses 



between the calyx lobes usually very broad and rounded; corollas 20-35 mm long; 



capsules globose or globose-ovoid; branches widely spreading. .. .1. G. purpurea. 

 Calyx lobes longer, 1.5-3.5 mm long, mostly about 2 mm long, acute; sinuses between 



the calyx lobes usually acute or rounded and much narrower than those of the 



preceding species; corollas 15-25 mm long; capsules globose or cylindric. 



