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



in extent and is of a single geological formation. The surface is of sand and gravel with 

 subordinate beds of clay or sandy clay, and there is an absence of lime in the area. A note 

 on the flora of this region has already been published by the author (Proc. Linn. Soc. p. 5, 

 1915-1916: see Jour. Bot. p. 94, 1916). Eight hundred fifty-four entries in the list have now 

 been made. The present paper contains a discussion of the occurrence of various plants 

 (20-30) from this list, and a comparison with the occurrence elsewhere. A list of the species 

 of Sphagnum found in the district is given and the various stations are cited. — K. M. Wiegand. 



1748. Moore, Spencer Le M. Alabastra Diversa. — Part XXXI. Jour. Botany 57:244- 

 251. 1919. — 1. Miscellanea Africana. (concluded from p. 219). Only new species are treated. 

 In this installment the following are described as new: Buchnera Kassneri, Belgian Congo; 

 Rhamphicarpa Elliotii, East Africa; Streptocarpus Eylesii, Rhodesia; Justicia (§ Harniera) 

 Dinteri, Southwest Africa; Dicliplera Batesii, South Cameroons; Lippia Gossweileri, Angola; 

 Clerodendron lupakense, C. bingaense, C. frutectorum, and C. consors, Belgian Congo; Loran- 

 thus (§ Erectilobi) Batesii Moore & Sprague, Cameroons; Acalypha eriophylloides, Angola; 

 A. Gossweileri, Angola. 2. Monimiacea Nova Brasiliensis. Mollinedia (§ Inappendiculala) 

 Cunninghamii, from Rio Janeiro, is described as new. [See also Bot. Absts. 3, Entry 3003.] 

 — K. M. Wiegand. 



1749. Nelson, James C. Notes on the grasses of Howell's flora of Northwest America. 

 Torreya 19: 187-193. 1919. — Howell's Flora, although a work of great merit in view of the 

 author's limitations, is now in great need of revision. One hundred and thirty-eight changes 

 affecting the nomenclature of the Gramineae are noted, grouped as follows: (1) Species not 

 included which have since been found in various localities in Oregon, 43; (2) species whose 

 existence in the territory is not confirmed. 10; (3) species whose taxonomic limits are now 

 generally understood differently, 83. — J. C. Nelson. 



1750. Nelson, J. C. Oregon Chenopodiums. Amer. Bot. 25: 112. 1919. 



1751. Nelson, J. C. Deam's trees of Indiana. [Rev. of: Deam, Chas. C. The trees of 

 Indiana. State Bd. Forest. Indiana Bull. 3. 299 p. March, 1919.] Rhodora 21:188-191. 

 1919.— See Bot. Absts. 4, Entry 454. 



1752. Nordberg, Arne. Ny fyndort for Cypripedium. [A new locality for Cypripedium.J 

 Bot. Notiser 1919: 167. 1919.— See Bot. Absts. 4, Entry 358. 



1753. Pammel, L. H. The willows and poplars of Iowa. Rept. Iowa State Hortic. Soc. 

 53 : 163-173. 12 pi. 1918. — The author gives a key to the poplars and willows of Iowa. (The 

 key for willows is supplied by C. R. Ball, and is based on foliage character and distribution 

 of the same in the state.) The following willows are recorded for Iowa: Salix lucida, S. pentan- 

 dra, S. alba, S. fragilis, S. babylonica, S. amygdaloides, S. nigra, S. interior, S. cordata, S. 

 missouriensis, S. pediccllaris hypoglauca, S. Candida, S. petiolaris, S. sericea, S. discolor, S. 

 eriocephala, S. humilis, S. tristis, S. Bebbiana. Of the species listed S. pentandra, S. fragilis, 

 S. babylonica, and S. alba are frequently cultivated. The S. alba is a frequent escape. The 

 following poplars are native or naturalized: Populus alba, P. candicans, P. balsamifera, 

 P. nigra dilatata, P. delloidcs, P. grandidentata and P. tremuloides. — L. H. Pammel. 



1754. Pammel, L. H. Some notes on plants of the proposed Mississippi Valley national 

 park. Rept. Iowa State Hortic. Soc. 53 : 379-382. 1918. — A list of the common trees, shrubs 

 and other plants found in the region. Of the rarer trees of Iowa mention is made of Fraxinus 

 americana, Quercus acuminata, Bciula lutca and B. papyrifera. — L. H. Pammel. 



1755. Pittier, H. On the origin of chicle with descriptions of two new species of Achras. 

 Jour. Washington [D. C] Acad. Sci. 9: 431-438. 1919. — It has been commonly reported that 

 the sole producer of chicle, the base of American chewing gum, is Achras Zapota L., an im- 

 portant fruit tree of Central and South America; but the author recently discovered, during 

 an official exploration through Central America, that chicle is not extracted exclusively, if at 



