830 MINNESOTA BOTANICAL STUDIES. 



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gle with the strong winds which sweep across this place, the 

 plants have become dwarfed and prostrate, forming a dense, 

 entangled clump, which rises barely a foot above the ground. 

 The branches are several feet long. Perhaps the strangest 

 feature is the black fruit. No. 2233, collected on a sheltered 

 slope in Waialae valley, eastern Oahu, was an erect shrub, four 

 or five feet high, with white berries, as is ordinary. 



MIMOSACEAE. 



ACACIA Auans. Pam. PI. 2:319. 1763. 



Acacia farnesiana Wiixd. Sp. PL 4:1083. 1806. 



Common on the hot dry slopes of the lee side of Oahu near 

 Honolulu. Here it never attains the size of a tree, but is always 

 shrubby. Specimens were collected at the base of Punchbowl, 

 back of Honolulu. 



March 25 (1996); original locality "in Domingo." 



Acacia koa A. Gray. Bot. U. S. Expl. Exped. 15:480. 1854. 



This is the "Koa" of the natives. It is a large tree, with far- 

 spreading branches, but very often has a comparatively short 

 trunk, as the branching begins at a distance of eight or ten 

 feet from the ground. From the trunks of this tree, the na- 

 tives used to make their large war canoes. The wood is sus- 

 ceptible of a high polish, and makes very handsome articles of 

 furniture. The woodwork and cases in the Bernice Pauahi 

 Bishop Museum, Honolulu, are made of Koa wood. On Oahu 

 and Kauai it is common in the lower forest, the dark green of 

 its foliage contrasting well with the light green of the Kukui 

 tree. True leaves are rarely seen, as they occur only on young 

 trees, and sometimes as adventitious shoots. Their place is 

 taken on full grown trees by scythe-shaped phyllodia. The 

 species is found only on the Hawaiian group. 



March 23 (1984). 



LEUCAENA Benth.; Hook. Journ. Bot. 4: 416. 1842. 

 Leucaena glauca (L.) Benth.; Hook. Journ. Bot. 4:416. 1842. 



Mimosa glauca L. Sp. PI. Ed. 2, 1504. 1763. 

 Acacia glauca Willd. Sp. PI. 4 : 1075. 1806. 



Introduced, and very abundant about Honolulu. A small 

 tree, with spreading slender branches, which bear an abun- 

 dance of cream colored flower heads. 



March 29 (2048); original locality, "in America." 



