Contribution to the Marine Chlorophyta of Hawaii, II 
Additional Records 1 
William J. Gilbert 
The annotated list which follows is com- 
prised mostly of new or previously unreported 
marine green algae from the Hawaiian Islands. 
Sources of material studied are listed in an ear- 
lier paper (Gilbert, 1962) with the exception 
of a few incidental collections forwarded to 
me during recent months by Dr. Maxwell S. 
Doty. 
This nearly completes a survey of the marine 
Chlorophyta of this area which was initiated in 
1959 by a four-month visit to the islands. The 
writer has still some material that is not named, 
particularly of Enter omorp ha and Cladophora, 
and only species in these genera are listed for 
which there seems to be reasonable certainty 
at this time. 
The following species constitute new records 
for the Hawaiian Islands: Enter omorpha clath- 
rata (Roth) Greville, E. plumosa Kiitzing, Mo- 
nostroma oxyspermum (Kiitzing) Doty, Ulva 
expansa (Setchell) Setchell and Gardner, U. 
reticulata f. delicatula n. f., Chaetomorpha 
hrachygona Harvey, C. gracilis Kiitzing, C. in- 
dica Kiitzing, C. paucitatis n. sp., Rhizoclonium 
grande B0rgesen, R. hookeri Kiitzing, R. ripa- 
rium (Roth) Harvey, Cladophora dotyana n. 
sp., C. hemisphaerica Gardner, Boodleopsis ha- 
waiiensis n. sp., C odium saccatum Okamura. 
Type material is deposited at the University 
of Michigan Herbarium, Ann Arbor. 
1. Enteromorpha clathrata (Roth) Greville, 
1830, p. 181. 
In both collections the plants are slender 
throughout and have many narrow branches 
some of which end in a uniseriate row of cells. 
The arrangement of cells in longitudinal rows 
throughout the plants and the presence of 3-5 
1 Albion College, Albion, Michigan. This study 
was supported by two grants from the National Sci- 
ence Foundation (NSF G7107 and NSF G25137 ) . 
Manuscript received May 8, 1963. 
pyrenoids in each cell confirm the plants as 
being E. clathrata. 
COLLECTIONS: Gilbert 9379, entangled on 
other algae, Ala Moana Park, Honolulu, Oahu, 
April 7, 1959; 9969, in wash of little bay at 
Milolii, Hawaii, May 30, 1959. 
2. Enteromorpha flexuosa (Wulfen) J. Agardh, 
1883, p. 126. 
COLLECTIONS: Gilbert 9016, Waikiki, Hono- 
lulu, Oahu, March 11, 1959; 9286, Vi mile E 
of McGregor’s Pt., Maui, March 25, 1959; 9342 , 
growing on basalt near high tide line, Wailua, 
Kauai, April 25, 1959; 9376, attached to rocks 
in active sand in from 1-3 feet of water at low 
tide level, Anahola, Kauai, April 26, 1959; 
9922, from rocks which were slightly covered 
with sand, submerged at high tide, and fre- 
quently washed by wave action at low tide, 
Hookena, Hawaii, May 25, 1959; 10061, from 
rocks on shore between low and high tide 
levels, between Kawela and Kamaloo, Molokai, 
June 5, 1959. 
3. Enteromorpha intestinalis (L.) Link, 1820, 
P-5- 
COLLECTIONS: Gilbert 9173, Camp 1, Spreck- 
lesville, Maui, March 23, 1959; 9382, canal at 
River St., near Nimitz Highway, Honolulu, 
Oahu, April 7, 1959. 
4. Enteromorpha lingulata J. Agardh, 1883, p. 
143. 
COLLECTION: Gilbert 9307, attached to 
rocks covered with a shallow layer of active 
sand, Haleiwa Park, Oahu, April 18, 1959; 
9729, on basalt and coral rocks, Anahola, Kauai, 
May 2, 1959. 
5. Enteromorpha plumosa Kiitzing, 1843, p. 
300, pi. 20, fig. 1. 
COLLECTION: Gilbert 9027, scraped from 
walls of tide pool filled with recurring waves, 
Diamond Head, Oahu, March 14, 1959. 
482 
