Campanulaceae. 



The genus Cyanea is endemic in the Hawaiian Islands and possesses more 

 species than either Clermontia or Delissea. All the species are shr^ibby, with 

 three exceptions. One species, C. leptostegia, reaches 40 feet in height, and is 

 the tallest of any of our Lobelioideae. The genus consists of many species, 31 

 having been so far described, while many more have been discovered by the 

 writer which will be published in a monograph on this tribe, bringing the 

 number of species of Cyanea probably up to 45, or even more. 



The genus Cyanea consists of milky shrubs or trees with a single erect or 

 branching stem, which includes a medullary cavity. Flowers are arranged in 

 racemes. 



KEY TO THE SPECIES. 



Calyeine lobes shorter than the tube. 



Flowers grayish white or cream colored C. artorea 



Calyeine lobes longer than the tube. 



Flowers dark purple : C. leptostegia 



Cyanea arborea (Gray) Hbd. 



(Plates 206, 207, 208.) 



CYANEA ARBOEEA (Gray) Hbd. Fl. Haw Isl. (1888) 261;— Del Cast. 111. Fl. Ins. Mar. 

 Paeif. Til (1892) 219.— Delissea corlacea var. ^ A. Gray 1. c. p. 148; — H. Mann 

 1. c. p. 178. — Delissea arborea H. Mann 1. c. p. 180. — Cyanea longifolia Heller 

 1. c. p. 909. 



Leaves sessile oblanceolate 40-65 cm x 7-12.5 em", shortly acuminate or rounded and 

 apiculate, gradually narrowing toward the base, faintly dentate, but almost entire and 

 wavy towards the base, glabrous or pubescent along the rib, glossy, eliartaceous to coriace- 

 ous; peduncle slender but stiff 15-30 cm long, almost naked above, closely many flowered 

 in the last fourth, pedicels short 3.8 mm; bracts 2-4 mm; bractlots 1 mm; calyx subglobose. 

 glabrous, shortly toothed, the tube 6 mm; corolla slender moderately curved, subereet ^ 

 cm long, 5 mm wide, glabrous grayish white, rather thin, with a deep dorsal slit and 

 connivent lobes; staminal colvimn glabrous; berry globose, faintly ribbed, 10-12 mm in 

 diameter. 



A tree 12 to 24 feet tall of palm-like habit with a crown of leaves at the apex 

 of the stem, the latter measuring about 4 inches in diameter or more. 



This is one of the most handsome Lobelias which the islands possess. Unfor- 

 tunately it is exceedingly scarce, and the writer fears that it has become extinct. 



Where there was once a forest at Ulupalakula there is now only grassland 

 with planted Eucalypti. The writer met with only one single plant in a small 

 gulch which was inaccessible to cattle. For three days the writer searched for 

 this beautiful Lobelia, and he had nearly abandoned all hope when he saw this 

 handsome plant hidden in a small and very narrow gulch. It evidently is thp 

 last of its race. In the whole district of Ulupalakua there is now no forest at 

 all, only here and there stands a tree of the araliaceous species Pterotropia 

 dipyrena. 



Cyanea comata, another beautiful lobeliaceous plant once common in this 

 district, has vanished forever. 



The plant is peculiar to Haleakala, Ulupalakua, Maui, and was once plentiful 

 at an elevation of 4000 to 5000 feet. It flowers in the early spring. 



493 



