10 



tarii vel plures ex axillis foliorum ; colore rubido obscuro vel 

 luteo; calyx deciduus in fructibus maturis. 



This proposed new genus consisting of 3 species peculiar to the 

 dry sections of Hawaii and Maui. is nearest to Hibiscus from 

 which it differs in its quite different flowers, deciduous calyx 

 and woody capsule. All three species are exceedingly rare, 

 only solitary trees being found in the various type localities, with 

 exception of Hibiscadelphus Hualalaiensis of which several trees 

 were found at Puuwaawaa and Waihou forest, on the western 

 slope of Mt. Hualalai. 



Hibiscadelphus Giffardianus Rock sp. n. 



Arbor 7 m alta, truncus 0.3 m diam. cortice albineo glabrato, 

 ramis robustis teretis ; foliis longe petiolatis, orbiculatis rustice 

 acuminatis basi cordatis, tomento stellato utrinque indutis ; palmato 

 septemnervatis, cum glandibus hispidis in angulis nervorum ; 

 stipulis parvis, triangulatis caducis ; floribus solitariis vel pluribus, 

 bracteolis 5-7 linearibus liberis ; calyce saccato profunde et inae- 

 qualiter 2-3-fido, lobis acuminatis, extus pilis stellatis induto, intus 

 glabro; corolla convoluta inflexa dependente in pedicellis 2 cm-3 

 cm longis ; petalis erectis obliquis oblongis, apice acutis 5 cm-6 cm 

 longis, partibus petalorum expositis pilis stellatis dense punctula- 

 tis ; columna staminea petalis longiore, ad basin hispida, tubo 

 costato tractu longo filamentis longis affixis ; ovario glabro ; stig- 

 matibus capitatis ; capsula lignea 4 cm- 5 cm x 2 cm-2.5 cm, pro 

 genere maxima, oblonga, rugosa extus pilis stellatis luteis induta ; 

 endocarpio chartaceo splendente tomentuloso, seminibus magnis 

 lanatis. 



In archipelagi Hawaiiensis insula Hawaii : J. F. Rock leg. in 

 declivibus montis Mauna Loa orientem versus 4300 pedes s. m. 

 fr. et fl. Aprilis et Jim. a. 1911. 



A tree 7 m high with a trunk of 0.3 m in diam., bark smooth 

 fibrous, whitish, branches terete, glabrous covered with leaf scars ; 

 leaves on long petioles orbicular cordate bluntly acute at the 

 apex 12-15 cm each way, unevenly crenate, papery, covered on 

 both sides with a stellate tomentum, palmately 7-nerved, with his- 

 pid glands in the angles of ribs and veins on both sides ; stipules 

 small, triangular caducous ; flowers solitary or several on the 

 axils of the leaves on the ends of the branches ; bracteoles 5-7, 



