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Only one tree was observed on the southern slope of Haleakala on the lava fields of Auahi at an elevation of 2600 feet. (Type No. 8663 Herb. Board of Agriculture and Forestry, T. H.). Named in honor of Mr. Gerrit P. Wilder of Honolulu who has shown great interest in growing and producing many varieties of Hibiscus.
Hibiscadelphus Hualalaiensis Rock sp. n.
Arbor 5-7 m alta, trunco erecto, 0.3 m diam. cortice albineo, glabrato; rami teretes, cum foliis novellis dense hirsuti, foliis reniformi-cordatis in petiolis 10 cm-16 cm longis, supra pilis stellatis inspersis, subtus tomentosis; (flores ignoti) capsula parva ovata 2 cm x 1.5 cm pilis stellatis flavescentibus dense induta.
In insula Hawaii: J. F. Rock leg. in declivibus montis Hualalai occidentum versus Jun. a. 1909.
Type material (No. 3915 Herbar. Board of Agriculture and Forestry, T. H.) collected June 18, 1909, at an elevation of 2700 feet on the lava fields of Puuwaawaa and in the forest of Waihou where a number of trees is to be found. The flowers are said to be yellow.
