GUTTIFERAE. 237 
Hypericum. St. John’s Wort. 
(Family Guttiferae). 
Small shrubs (or most species 
herbaceous), with _ exfoliating 
bark: deciduous. Twigs slender, 
usually small, angled at least be- 
low the nodes: pith small, green 
or brown, spongy and finally ex- 
cavated. Buds solitary, sessile, 
minute, with 2 or several scarcely 
specialized scales, often develop- 
ing the first season and sometimes 
forming short axillary branches 
covered by scars. Leaf-scars op- 
posite, small, triangularly lens- 
shaped, little raised:  bundle- 
trace 1: stipule-scars lacking. 
Very little attention has been 
paid to the winter-characters of 
Hypericaceae. LOofling, in his 
Gemmae Arborum, p. 198, de- 
scribed the buds of Hypericum | 
Androsaemum; H. calycinum is 
pictured by Schneider, f. 119; and Meigen considers the win- 
ter condition of H. elodes and H. perforatum in a paper on 
the vegetative organs of various perennials. 
1. Twigs very evanescently angled. (1). H. prolificum. 
Twigs rather persistently 4-angled. 2. 
2. Buds distinctly scaly. (2). H. calycinum. 
Buds scarcely with specialized scales. 3. 
3. Openly bushy. (3). H. Kalmianum. 
Round-topped. (4). H. aureum. 
