54 THALAMIFLORffi 



Found only on the coasts of Devon and Cornwall. Fl. summer. 

 Perennial. 



8. H. pulchrum (Slender St. John's Wort). Stem erect, round 

 smooth, slender, 1-2 feet high ; leaves heart-shaped, embracing 

 the stem, marked with pellucid dots ; sepals obtuse, fringed with 

 black sessile glands. A slender plant, with scanty foliage, and 

 golden yellow flowers, which, when in bud, are stained externally 

 with red. Fl. July, August. Perennial. 



9. H. hirsutum (Hairy St. John's Wort). Stem erect, nearly 

 found, downy ; leaves shortly stalked and downy beneath ; flowers 

 like H. pulchrum, but a lighter yellow, and the plant rather 

 taller. Woods, especially in chalky or limestone soil, common. 

 Fl. July. Perennial. 



10. H. montanum (Mountain St. John's Wort). Stem erect, 

 round, smooth ; leaves oblong, sessile, smooth, with black dots 

 near the margin on the under side ; sepals acute, fringed with 

 shortly-stalked glands ; growing about 2 feet high, and at once 

 distinguished from any of the preceding species by the black 

 fringe of its sepals. Limestone hills, not common. Fl. July. 

 Perennial. 



11. H. Elodes (Marsh St. John's Wort). Stem creeping, 6-12 

 inches long ; branches erect ; leaves roundish, and, like the stems 

 which they clasp, densely clothed with shaggy down ; flowers few, 

 pale yellow, remaining open but a short time. Spongy bogs ; 

 not uncommon in Western England. Fl. July, August. Perennial. 



Natural Order XIX 

 ACERACE^E. The Maple Tribe 



Really a tribe of the Natural Order, Sapindacese, in another 

 tribe of which occur the Horse-chestnut {Hippocastanece) and the 

 Litchi. The Acers are trees with opposite, stalked leaves, which 

 are veined in a palmate manner. Calyx divided into 5 parts 

 (occasionally 4-9) ; petals of the same number ; stamens about 8, 

 inserted on a flattened ring beneath the ovary ; ovary 2-lobed ; style 

 1 ; stigmas 2 ; fruit 2-lobed, 2-celled, not bursting ; lobes winged 

 on the outside ; cells 1-2-seeded. Found only in the temperate 

 regions of the northern hemisphere ; several species abound in 

 a sweet juice, which in North America is manufactured into maple 

 sugar. 



1. Acer (Maple). Calyx 5-cleft ; petals 5 ; capsules 2, each 

 furnished with a long wing. (Name from the Celtic, ac, a point, 

 on account of the hardness of the wood, which was used for making 

 spears and other sharp-pointed instruments.) 



