No. 2, December, 1921] ECOLOGY, PLANT GEOGRAPHY 77 



present dimensions being about 0.5 by 2 km. The region is underlain by limestone ("terreno 

 nummulitico") with some sandstone, and considerable travertine from the lake. There are 

 many fissures and faults in the neighborhood as well as small fluctuating lakes. — A list of 

 31 mosses and 9 hepatics is given, in each case with short notes upon habitat, soil preference, 

 and general distribution. One hepatic, Lejeunea calcarea Lib. var. Rosettiana Mass, is noted 

 as new to the flora of Spain. — E. B. Chamberlain. 



479. Bhan, W. J. Abraham's Oak. Kew Bull. 1919: 233-236. 1 fig. 1919.— Quercus 

 coccifera palaestina from Jerusalem is discussed. — E, Mead Wilcox. 



480. Britton, N. L. A botanical expedition to Trinidad. Jour. New York Bot. Gard. 

 21 : 101-118. 1920. — Besides a general jiarrative of the expedition, the article presents general 

 accounts of the vegetation of Trinidad and the neighboring islands. This includes tropical 

 rain-forest, open savannas, and coastal deserts with abundant cacti. — H. A. Gleason. 



481. CoBURX, Louise H. Flora of Birch Island in Attean Pond. Rhodora 22: 129-138. 

 1920. — Attean Pond is one of the Moose River chain of lakes which extend from west to east 

 across the northern part of Somerset County, Maine, draining into the Kennebec by way of 

 Moosehead Lake. Birch Island, the largest in this lake, has an area of something over 25 

 acres, is very irregular in outline, and appears to have a backbone of granite boulders, — 

 glacier-borne from the rocky heights to the north, — while the sand and gravel of the beaches 

 show the same origin. The larger part of the island is covered with a nearly pure stand of 

 fir which is coming up under and slowly replacing an older white birch forest. The flora .of 

 the island divides itself naturally into 7 associations: (1) The forest flora; (2) flora of the 

 rocky shore below high water line; (3) flora of the marshes; (4) flora of the gravel beaches; 

 (5) water flora of the coves; (6) flora of the cleared ground; (7) waste ground flora. A list of 

 species is given for each of these associations with an additional short list of plants found in 

 Attean Township outside of Birch Island. — James P. Poole. 



482. Darlington, H. T. Distribution of the Orchidaceae in Michigan. Michigan Acad. 

 Sci. Ann. Rept. 21 : 239-261. / pi. 1919. — The greater number of species of the Orchidaceae 

 of Michigan occur south of the Jack Pine Region; a few are found in the Upper Peninsula and 

 in the northern part of the Lower Peninsula. Cytherea is one of the distinctly boreal species. 

 The rarest species known in the state is Triphora trianthophora. The orchid flora of the state 

 comprises 70 per cent of the total number of species known within the northeastern United 

 States and Canada. A key to the genera and species and full notes on the distribution of the 

 species are given. — Bertha E. Thompson. 



483. FiNCKH, H. E. On Riccia fluitans. Australian Nat. 4: 151. 1920. — The occurrence 

 of the species in 2 localities is mentioned. — T. C. Frye. 



484. FiTZPATRicK, T. J. The fern flora of Nebraska — II. Amer. Fern Jour. 10: 33-44. 

 1920. — The article contains an annotated list of 21 species of pteridophytes, distributed among 

 14 genera and 6 families. — F. C. Anderson. 



485. GiNZBERGER, A. Zwsi neue Standorte der gefeldert-rindigen Buche, Fagus silvatica 

 var. quercoides Pers., in Mittel Italien und Slavonien. [Two new stations for the groove- 

 barked beech, Fagus silvatica var. quercoides Pers., in central Italy and in Slavonia.] Natur- 

 wiss. Zeitschr. Forst- u. Landw. 18: 39-41. 1920. — Previous reports had confined the range 

 of this tree to southern, central, and western Germany, and 1 stand in southern Hungary. 

 The tree recently identified in Italy was found in the southern Abbruzzia, the other in the 

 highlands of western Slavonia in 1918; both were old, the latter evidently decadent. The 

 author also discovered 2 beautiful examples of var. quercoides in 1919 in the Lainz Zoological 

 Park near the western city limits of Vienna. — /. Roeser. 



486. Graves, E. W. The fern flora of Alabama. Amer. Fern Jour. 10: 65-82. PI. 1, 

 fig. 1-2. 1920. — The author lists 69 species of pteridophytes distributed among 23 genera and 

 3 families. — F. C. Anderson. 



