36 BULLETIN 193, UNITED STATES NATIONAL MUSEUM 



Oplismenus. By A. S. Hitchcock. Pp. 123-132, 4 figs.; The North American 

 species of Echinochha. By A. S. Hitchcock. Pp. 133-153, 11 figs.; The North 

 American species of Chaeiochloa. By A, S. Hitchcock. Pp. 155-208, 27 figs. 

 Nov. 1, 1920. 



4. The North American species of Pennisetum. By Agnes Chase. Pp. 209-234, 14 



figs. Feb. 2, 1921. 



5. Flora of Glacier National Park, Montana. By Paul C, Standley. Pp. 235-438, 



20 pis. Mar. 16, 1921. 



6. Grasses of British Guiana. By A. S. Hitchcock. Pp. 439-515, 10 figs., 1 pi. 



May 24, 1922. 



7. The North American species of Aristuia. By A. S. Hitchcock. Pp. 517-586. 



May 21, 1924. 



8. New American Asteraceae. By S. F. Blake. Pp. 587-661, 1 fig., 10 pis. May 



22, 1924. 



9. Studies in American Phaseolineae. By C. V. Piper. Pp. 663-701, 1 pi. June 



12, 1926. 



10. The North American species of Scutellaria. By Emery C. Leonard. Pp. 703-748. 



Feb. 9, 1927. 



Volume 23 



Trees and shrubs of Mexico. By Paul C. Standley. Pp. i-vil (title, advertisement, 

 note, preface, contents); pp. 1-1681 (parts 1-5) ; pp. 1683-1721 (index). 1920-1926. 

 Part 



1. Gleicheniaceae-Betulaceae. Pp. 1-169. Oct. 11, 1920. 



2. Fagaceae-Fabaceae. Pp. 171-515. July 14, 1922. 



3. Oxalidaceae-Turneraceae. Pp. 517-848. July 18, 1923. 



4. Passifloraceae-Scrophulariaceae. Pp. 849-1312. Dec. 31, 1924. 



5. Bignoniaceae-Asteraceae. Pp. 1313-1681. Nov. 15, 1926. 



Volume 24 



Plant studies, chiefly tropical American. Pp. i-xii (title, advertisement, title page, 



note, preface, contents, and illustrations) ; pp. 1-762 (parts 1-9) ; pp. 763-802 



(index) ; 4 figs., 52 pis. 1922-1930. 

 Part 



1. New plants from Guatemala and Honduras. By S. F. Blake. Pp. 1-32, 4 figs., 



10 pis. Jan. 11, 1922. 



2. Studies of tropical American ferns — No. 7. By William R. Maxon. Pp. 33-63, 



10 pis. Aug. 15, 1922. 



3. Key to frenus Diplostephium, with descriptions of new species. By S. F. Blake. 



Pp. 65-86, 8 pis. Aug. 11, 1946. 



4. Native names and uses of some plants of eastern Guatemala and Honduras. 



By S. F. Blake. Pp. 87-100, 5 pis. Aug. 18, 1922. 



5. Economic fruit-bearing plants of Ecuador. By Wilson Popenoe. Pp. 101-134, 



16 pis. May 28, 1924. 



6. A bibliographic study of Beauvols' Apvostographic. By Cornelia D. Niles. With 



introduction and botanical notes, by Agnes Chase. Pp. 135-214. Aug. 20, 1925. 



7. The North American species of Stipa. By A, S. Hitchcock. Pp. 215-262, 3 pis. 



Nov. 20, 1925. 

 Synopsis of the South American species of Stipa. By A. S. Hitchcock. Pp. 263-289. 

 Nov. 20, 1925. 



8. The grasses of Ecuador, Peru, and Bolivia. By A. S. Hitchcock. Pp. 291-556. 



May 4, 1927. 



9. The grasses of Central America. By A. S. Hitchcock. Pp. 557-762. Feb. 12, 1930. 



Volume 25 



Flora of Utah and Nevada. Bv Ivar TIdestrom. Pp. 1-655, 2 figs., 15 ph., 1 map. 

 Oct. 31, 1925. 



