52 . BOTANICAL GAZETTE [JULY 
of Micronesia. He recognizes 37 genera, one of which (Rhynchophreatia) is 
new, and describes 38 new species. We are only beginning to realize the 
wealth of orchids in the tropics. 
Hucues” has published a revision of the Australian species of Stipa, 
recognizing 40 species, 17 of which are described as new. This is in striking 
contrast with the 15 species recognized in the Flora Australiensis, especially 
since only _s species of the 40 characterized are based on material unknown 
to BEN 
ae ae anent numbers of N otizblatt (Bot. Gart. Berlin-Dahlem) contain 
dema (Gesneriaceae) by SCHLECHTER (7:15-18. 1920), from the East Indies 
and the Philippines; Peekelia (Leguminosae) by Harms (7:26, 27. 1920), 
from New Guinea; Chelyocarpus (Palmaceae) by DAMMER (7:44-5I. 1921), 
from Brazil; Paraphyadanthe (Flacourtiaceae) by MILDBRAED (7:390-495. 
1921), from Africa; Cheilanthopsis (Polypodiaceae) by HrzronyMus (7:406- 
409. 1920), from Burma; Afrolicania (Rosaceae) by M1LpBRAED (7:483-485. 
1921), from Africa; Neozenkerina (Scrophulariaceae) by MILDBRAED (7:491- 
493. 1921), from Africa; Stenodrepanum (Leguminosae) by Harms (7:400-501. 
1921). KRANZLIN (7:412-451. 1920) also describes 44 new species of Orchi- 
daceae from Columbia, this being only the first paper of a series.—J. M. C. 
of Hawaiian flora.—Because of its notable endemism, the flora of 
the Hawaiian Islands has always been of fascinating interest to plant geogra- 
phers. CAMPBELL’ in some recent studies of this flora regards the Hawaiian 
problem as the most important distributional problem that exists anywhere. 
HILLEBRAND, and perhaps most investigators, have held that the Hawaiian 
flora has always been isolated, the islands having been thrown up from great 
depths by volcanic action. Recent studies by Pirspry on the Hawaiian 
land snails have shown noteworthy Malaysian affinities, and now CAMPBELL 
finds similar evidences from the plants. The liverworts and filmy ferns in 
particular are unsuited to long overseas transportation, and must have existed 
in Hawaii since it was connected with other lands. The relationship of these 
plants is much closer to the flora of Malaysia and Australasia than to America. 
Of 40 species of pteridophytes found elsewhere, 38 are common to Australasia 
or Malaysia, and only two are common to America. Fifty-one genera of 
spermatophytes are common to Australasia or Malaysia, and only six are 
common to America. The endemic genera are more closely related to Asia 
% Hucues, D. K., A revision of the Australian species of Stipa. Kew Bull. 
no. I. pp. 30. 1921. 
13 CAMPBELL, D. H., The origin of the Hawaiian flora. Mem. Torr. Bot. Club 
17:90-96. 1918. 
, The derivation of the flora of Hawaii. Leland Stanford Junior Univ. 
Publ. I. pp. 34. 1919. 
