266 TAXONOMY, VASC. PLANTS [Bot. Absts., Vol. IV, 



hypargyrum, E. iodotrichum, E. iresinoides HBK. var. adenoirichum, E. isillumense, E. loba- 

 tum, E. mallotum, E. mallotum Robinson var. ? aporum, E. Mathewsii, E. metense, E. orgya- 

 loides, E. Pachanoi, E. phoenicticum, E. pseudodalea (DC.) Gomez & Molt. var. typicum, 

 E. pseudodalea (DC.) Gomez & Molt. var. apodophyllum, E. pseudo-dalea (DC.) Gomez & 

 Molt. var. macrodontum, E. psilodorum, E. rhypodes, E. Roseorum, E. roupalifolium, E. simu- 

 lans, E. solidaginoides HBK. var. Armourii, E. Sprucei, E. squalidum DC. var. Rusbyanum, 

 E. Steetzii, E. stictophyllum, E. tarapotense, E. uber, E. urubambense, E. vallincola DC. var. 

 typicum, E. vallincola DC. var. brevipilum, Brickellia ? Arsenei, Calea caracasana (HBK.) 

 Ktze. var. pilosior Ktze. forma discoidea. II. A Recension of the Eupatoriums of Peru. 

 Ibid. 42-88. The author gives keys to the 82 species known to occur in Peru. Exsiccatae and 

 pvnonyms are cited and many diagnoses and critical notes are given. The following new 

 combinations (with the name-bearing synonym in parentheses) are made: Eupatorium exserto- 

 venosum Klatt, var. crenatum (E. pseudofastigiatum var. crenata Hieron.), E. exserto-venosum 

 Klatt. var. crenato-dentatum (E. pseudofastigiatum var. crenato-dentata Hieron.), E. exserto- 

 venosum Klatt, var. lanceolatum (E. pseudofastigiatum var. lanceolalum Hieron.), E. klein- 

 ioides HBK. var. typicum (E. kleinioides forma typica Hieron.), Helogyne straminea (Eupa- 

 torium stramineum DC). — E. B. Payson. 



1763. Rock, J. F. The arborescent indigenous legumes of Hawaii. Hawaii Bd. Agric. 

 and Forest. Div. Forest. Bot. Bull. 5. 53 p. PI. 1-18. 1919.— The author gives botanical 

 descriptions and notes on various species and varieties of indigenous Hawaiian legumes 

 included under the following genera: Acacia, Mezoneurum, Sophora, and Erythrina. — J. HI. 

 }]'estgate. 



1764. Rock, J. F. The Hawaiian genus Kokia, a relative of the cotton. Hawaii Bd. Agric. 

 c md Forest. Div. Forest. Bot. Bull. 6. 22 p. PI. 1-7. 1919. — Botanical and historical notes 

 are given concerning Kokia lanceolala, K. Rockii, and K. Rockii var. kauaiensis n. var., 

 together with a description of measures looking to the preservation to science of these rare 

 trees because of their possible importance in relation to the solution of cotton-breeding 

 problems. — /. M. Westgate. 



1765. Russell, Alice M. A comparative study of Floerkea proserpinacoides and allies. 

 Contrib. Univ. Pennsylvania Bot. Lab. 4:401-418. PL 91-92. 1919.— See Bot. Absts. 3, 

 Entry 2444. 



1766. Sargent, C. S. Notes on North American trees. V. Jour. Arnold Arboretum 

 1 : 61-65. July, 1919. — The present article deals with Populus and Betula. The author adopts 

 Populus tacamahaca Mill, for P. balsamifera of authors, not Linnaeus, and P. balsamifera L. 

 for P. deltoidea var. missouriensis Henry (P. angulata Michx.) with the variety P. balsami- 

 fera var. virginiana (Castiglioni) for P. deltoidea Marsh. Besides the last named the fol- 

 lowing varieties and combinations are published as new: Populus acuminata var. Rehdcri, P. 

 Fremontii var. macrodisca, P. balsamifera f. pilosa, Betula papyrifera var. elobata (Fernald), 

 B. papyrifera var. occidentalis (Hook.), B. papyrifera var. subcordala (Rydberg), B. papyri- 

 fera var. montanensis (Butler), B. fonlinalis var. Piperi (Britton). — Alfred Rchdcr. 



1767. Sciileciitek, R. Versuch einer natiirlichen Neuordnung der afrikanischen angrae- 

 koiden Orchidaceen. [A proposed natural new arrangement of the African angraecoid 

 Crchidaceae.] Beih. Bot. Centralbl. 35": 62-181. 1918. — The African angraekoid orchids are 

 arranged in 32 genera. Of these, 12 are new: Rhipidoglossum, Podangis, Phormangis, Sarco- 

 rhynchus, Bolusiella, Chamaeangis, Solenangis, Eurychone, Cephalangraecum, Crossangis, 

 Oconiella and Bathiea. The number of species presented in the 32 genera totals 361, of which 

 86 are placed in the genus Angraecum itself. Many new combinations are introduced in the 

 nomenclature of species. — Earl E. Sherff. 



1768. Schlechteu, R. Kritische Aufzahlung der bisher aus Zentral-Amerika bekanntge- 

 wordenen Orchidaceen. [Critical enumeration of the known orchids of Central America.] 

 Beih. Bot. Centralbl. 36": 321-520. 1918.— One hundred pages (p. 421-520) are occupied with 



