103 



Lamina broadly deltoid, and, with the sporophyl, entirely bent down in verna- 

 tion, sessile or nearly so. 

 Bud smooth, in a closed sheath, plants 5-32 cm. high, lamina 1-6 cm. 

 long, 0.8-9 cm. broad, 1-2 or rarely 3 times divided, the sporophyl 

 short-stalked, about one-fourth the height of the plant, the panicle 

 usually stout and diffuse. 8. B. lanceolatum (Gmel.) Angstr. 



Bud hairy, in an open sheath, plants 8-80 cm. high, the lamina 2.5-35 cm. 

 long, 4-42 cm. broad, 3-5 times divided, the sporophyl long-stalked, 

 one-third to one-half the height of the plant, the panicle slender. 

 Lamina annual, panicle slender (continental North America, also in 

 Europe and Asia). 9. B. virginianum (L. ) Sw. 



Lamina persistent for two to four years, the panicle stouter (Jamaica). 



10. B. dichronuni Underwood. 



A treatment of this section of the genus BotrycJiiiivi is hardly- 

 complete without reference to Mr. Davenport, and his contribu- 

 tion to our knowledge of some species in it and their relation- 

 ships. His pains-taking work with B. simplex, and his discovery 

 and exposition of the bud characters by which many of the species 

 may be certainly identified, will probably always remain, from a 

 taxonomic standpoint, the most valuable additions to our knowl- 

 edge of this group. 



New York Botanical Garden. 



COLLECTING LIVERWORTS IN JAVA 



By Douglas Houghton Campbell 



Two years ago it was my good fortune to spend over three 

 months collecting in Java, perhaps the most interesting region in 

 the world to the botanical student. Wallace pronounced Java 

 to be the most beautiful of all tropical islands, and one who has 

 visited it is inclined to agree with his verdict. Lying as it does 

 only a few degrees from the equator and possessing an exceed- 

 ingly heavy rainfall and a volcanic soil of extreme fertility, the 

 vegetation shows a luxuriance and variety that far surpass any- 

 thing I have ever seen in any other part of the world. This 

 great variety is shared by the lower plants, and the liverworts 

 include many forms of the greatest interest. 



Java is extremely mountainous, being largely composed of a 

 range of volcanoes, several of which exceed ten thousand feet in 

 height, and there is great difference in the rainfall at various 



