540 Philippine Journal of Science 1919 
CYATHEACEAE 
CYATHEA Smith 
CYATHEA HAENKEI (Presl) comb. nov. 
Alsophila haenkei Presl Rel. Haenk. 1 (1825) 68. 
Cyathea marianna Gaudich. Bot. Freyc. Voy. (1826) 285. 
Guam, Nelson 588, May, 1919, in ravines near the headwaters of a 
tributary to the Pago River. 
The type of Presl’s species was from the Marianne Islands, 
in all probability from Guam, while that of Gaudichaud was 
from Guam. Both have been reduced as synonyms of Alsophila 
extensa (Forst.) R. Br., which does not appear to me to be 
correct. Regarding the occurrence of this species in Guam I 
wrote to Mr. Nelson in September, 1914, supplying him with 
photographs of Philippine tree ferns, and suggested that he 
search for the Guam species, to which he replied that in his 
fourteen years residence in Guam, in which time he had visited 
most parts of the Island, he had never seen any tree ferns. A 
few specimens were located by him in May, 1919, apparently 
very old plants. The larger plants were about 3 m high, the 
trunk 15 to 20 cm in diameter below, tapering to 10 cm near 
the top. The species is apparently very rare and local in Guam 
and is probably approaching extinction. 
GRAMINEAE 
THUAREA Persoon 
THUAREA INVOLUTA (Forst. f.) R. & S. Syst. 2 (1817) 782. 
Ischaemum involutum Forst. f. Prodr. (1786) 73. 
Thuarea sarmentosa Pers. Syn. 1 (1805) 110. 
Guam, Anigua, Nelson 342, December, 1919, along the sea- 
shore, local name las-aga. A common Malayan-Polynesian 
strand plant, but not previously recorded from Guam. 
GARNOTIA Brongniart 
GARNOTIA STRICTA Brongn. in Bot. Duperry’s Voy. (1829) 132, t. 21. 
Guam, hills back of Piti, Nelson 359, 403, December, 1918, 
and February, 1919. The genus is new to Guam, the species 
having been originally described from Tahiti, but now, as a 
somewhat variable one, known to extend from India, through 
Malaya to Hawaii. 
DIGITARIA Heister 
DIGITARI A ROBINSONII sp. nov. 
Species D. pacificae Stapf et D. stenotaphrodi Stapf affinis 
differt racemis numerosis, plerumque circiter 15, confertis, ra- 
cemose dispositis. 
