25. ONAGRACE^E. 63 



* 2. P. COMMUNIS, L. Wild Pear- Tree. A larger tree than 

 the last, with dense foliage. Le. on rather long petioles, ovate, 

 serrate. Fl. corymbose, large, pure white. Styles long, distinct. 

 Fruit turbinate. 



Has no claim to rank as belonging to this country. " On the banks of the Avon 

 below Chatelherault." Pair. (E) T. 45. Origin of the Pear. 



3. P. AUCUPAKIA, Gaertn. Mountain- Ash, Rowan-Tree, Roan- 

 Tree. An elegant tree of moderate size, with erect branches. Le. 

 pinnate, leaflets oblong, serrate, smooth when old. Fl. corymbose, 

 white, very numerous. Fruit small, globose, scarlet, generally 

 3-celled. 



Common. In mountain woods. (B) T. 5 5. Cambuslang glen ; Calderwood 

 glen; Gourock; Kilmun ; Bute; Cumbrae and Arran. 



4. P. A'niA, Sm, Var. pinnatifida, P. fennica, Bab, Bastard 

 Mountain-Ash. A small tree; the young shoots, under side of 

 the le. and inflorescence, covered with a white down. Le. oblong, 

 pinnatifid below, finely serrate, doubly serrate at the apex, under 

 side white and downy. Fl. white, corymbose. Fr. globose, 

 scarlet. 



Very rare. " Island of Arran, near Loch Ranza," Mr. J. T. Maclcay. (E) T. 5 6. 

 Mr. J. F. Duthie finds in Arran another variety, with some of the basal segments 

 pinnate. 



25.-ONAGRACE.E. 



1. EPILOBIUM. Willow-herb. 



A. Flowers irregular in a long raceme. 



* 1. E. ANGUSTIFOLTUM, L. Rose-Bay Willow-herb, French- 

 Willow. Stem erect, round, branched, or simple, 3 6 ft. high. 

 Le. crowded, lanceolate, or linear-lanceolate, entire, or with very 

 small teeth, attenuated at each end. St. and styles declining. Fl. 

 large purplish red. Stigma deeply 4-lobed. Cap. 1 1^ in. A 

 common plant in gardens. 



Not common, but where found, an escape from cultivation. P. 7. " Banks of 

 the Avon, opposite Barncluith; by the fall at Corhouse," Pair. Stonelaw wood. 



Var. macrocarpum. Flowers about 1 inch in diameter. Cap. 

 2 3 in. long, -erect. 



Rev. D. Landsborough sent a scrap scarce fit for determination, gathered "near 

 the top of the ridge above Glen-Cloy," Arran. 



B. Flowers regular. Stigma deeply 4-lobed. 



2. E. HIRSUTUM, L. Great Hairy -Willow -herb, Codlins-and- 

 Cream. Stem erect, round, branched, 3 5 ft. high. Le. lanceo- 

 late, sessile, semi-amplexicaul, very shortly decurrent, serrate. 

 Fl. large, deep purplish-red. Pods very long, quadrangular. 

 Whole plant covered with soft hairs. 



Frequent. Sides of lakes, ditches, and rivers. (E) P. 78. Banks of the 

 Forth and Clyde Canal beyond Lambhill bridge ; banks of Cart and Clyde, 



