24 Director's A7i7uial Report 



FILICALES. 



Ceropteris calomelanos ( L. ) Und. 

 AcrostitintJH caloJiiclaiios L., Sp. PL, ii, 1753, 1072. 

 Gyiinnmranniia calomelanos Kaulf., Enum., 1824, 76. 

 Ceropteris caloinelauos {h.) Und., Torr. CI., 1902, 29, 632. 



The .silver fern i.s well established on all the islands, gener- 

 ally occuring along roadsides and irrigating ditches. 



Ceropteris calomelanos var chrysophylla Link. 

 (•yvuiograunite rhrysophyllini! Klf., Enuni., 1824, 74. 

 Ceropteris citrysopliylla Link, Sp., 1841, 143. 



The gold fern has the same distribution as the former but is 

 less common. On Hawaii it was observed growing in the steam 

 cracks at Kilauea. 



HYDROCHARITACEAE. 



Halophila ovata Gaud. 



Halophila ovata Gaud., Freyc. Voy. Bot., 1826, 430, t. 40. f. 



Halopliila oralis Hook., Fl. Tas., 1S60, ii, 45. 



Miss M. Reed showed me a specimen of this plant which she 

 said was identified by Dr. W. A. Setchell. It occurs in brackish 

 ponds in the vicinity of Honolulu. 



LEMNACEAK. 



I/emna minor L. 



Loiina )iii)ior 'L,., Sp. PL, 1753, 970. 



The duck weed is common in ponds and taro patches on all 

 the islands. 



CHENOPODIACEAE. 



Amaranthus spinosus L. 



AiJiara)!t/nis spiiiosiis h., '>\>. PL, 1753, 991. 



A rather common weed on Oahu, probably occurring on other 

 islands as well. 

 C. N. F., no. 1060. O. Nuuanu Valley. 



POLYGONACEAE. 



Rumex acetocella L. 



A'Hine.r acetoeella L., vSp. PL, 1753, 338. 



The sorrel occurs on all the islands and at all elevations. 

 First reported from Kauai by Heller. 



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