Director's Report for 1916. II 
a primitive condition or partly an after effect or weathering, per- 
haps due to rain falling on the cooling lava. 
“On the south point of Hawaii there are now four flows of 
known date in close proximity, even overlapping in places, namely 
1868, 1887, 1907 and 1916. ‘The invasion of plants on these areas 
of brand new earth are of immense interest to a botanist; there 
being few places in the world where such phenomena can be readily 
observed. 
“During October and a part of November a collecting trip 
was made to Kauai. With Lihue as a base, camping trips were 
taken to Kilauea, Nonou Mountains, Hii Mountains, and day trips 
to the Haupu Range, Wailua Falls and other places in the immedi- 
ate vicinity. In spite of rainy weather a fair collection of plants 
was made. 
‘‘T was enabled to confirm certain statements made to me by 
Rev. J. M. Lydgate concerning A77ghamia insignis as it occurs on 
Kauai. The Kauai plant has different colored flowers from the 
plant occuring on the central islands of the group, but otherwise 
there seems to be no constant or striking differences of specific or 
varietal rank, although it may be safe to give the Kauai plant the 
form name of c7/vi7a.' 
‘‘Probably Remy’s Niithau specimens cited by both Gray and 
Hillebrand belong to this form. I have observed Arighamia along 
the Kalalau trail on Kauai hut notin flower. So far the genus 
has not been reported from either Oahu or Hawaii, but it would 
not be safe to say that it does not occur. A difference between 
the plant of the central islands of the group and that of Kauai is 
of rather more than passing interest. 
‘‘During the year Mr. A. S. Hitchcock of the Bureau of Plant 
Industry, Washington, D. C., an expert on grasses, visited our 
Herbariam and looked through the specimens. Both his friend- 
ship and identifications in this difficult group were a welcome help. 
An exchange has been arranged with Mr. Hitchcock. 
‘Brighamtia insignis forma citrina forma nova, Forbes and Lydgate. 
Differs in the lemon yellow corolla, brighter yellow on the inner side of the 
expanded lobes; in contrast to the creamy or white corolla of the type. The 
expanded lobes are acute rather than acuminate, and the calyx teeth are 
shorter, but these are not constant differential characters. Leaves as in the 
species. Type locality, Haupu Range near Nawiliwili Bay, Kauai. Forbes, 
No. 706, K., Oct. 31, 1916. 
[203 ] 
