842 



SCROPHULARIACEAE 



Mimulus 



50 



Map 1829 

 Penstemon hirsutus (L.) W Mid. 



50 



Map 1830 



Mimulus ringens L. 



^50 



Map 1831 



Mimulus alatus Ait. 



7513. PAULOWNIA Sieb. & Zucc. 



1. Paulownia tomentosa (Thunb.) Steud. Royal Paulownia. This 

 species has been introduced in a few Ohio River towns and is apparently 

 hardy. I know of a planted tree that is hardy on the "knobs" about 3 miles 

 northwest of Henryville, Clark County. In 1925 I found a tree in a woods 

 just east of no. 10 school about 5 miles southeast of Laconia, Harrison 

 County. It was 10 inches in diameter with a clear bole of about 30 feet. 

 This tree was surrounded by several rootshoots, one of the largest of which 

 I cut off. It measured slightly more than 2 inches in diameter near the base 

 and was 5 years old. In 1935 I again visited this place and found that the 

 large tree had been cut but that there were many seedlings along the road- 

 side about 125 feet distant where the mineral soil was exposed. In 1935 

 some specimens were sent to me from a "black jack" ridge about 3 miles 

 south of Livonia, Washington County. The letter accompanying the 

 specimens said that there were a few small trees about 15 feet high. Ralph 

 M. Kriebel writes that there are a few trees planted in Bedford, Lawrence 

 County, and that in 1935 he found it as an escape in four abandoned stone 

 quarries in the vicinity of Bedford. It was found growing in the "grout" 

 (small chips of limestone) of these quarries. This habitat observation is 

 very significant and worthy of further investigation. 



Some recent authors place this genus in Bignoniaceae. (Campbell. The 

 relationships of Paulownia. Bull. Torr. Bot. Club 57: 47-50. 1930.) 



Nat. of Japan. 



7524. MlMULUS L. Monkeyflower 



[Grant. A monograph of the genus Mimulus. Ann. Missouri Bot. Gard. 

 11: 99-399. 1924.] 



Stems erect; leaves lanceolate, oval or ovate; flowers Hortense Violet (Ridgway). 



Leaves clasping; angles of stem wingless 1. M. ringens. 



Leaves petiolate; angles of stem more or less winged 2. M. alatus. 



Stems diffuse; leaves nearly orbicular; flowers lemon yellow. (See excluded species 

 no. 565, p. 1089) M. glabratus var. Fremontii. 



