91 



Of the first section, C. angusfifolia, with its many varieties, has spread from 

 Oahii as far as jMaui and Lanai, but not to Kauai, which island is separated 

 from Oahii by a channel of 60 miles width; its var. racfmosa from the Koolau 

 mountain range, Oahu, and Lanai, links togetlier three species occurring- on Kauai, 

 C. coriacca. C. Faurici and ('. Hardyi. All three in turn are related to a ilaui 

 species, C. coniata. It may be suggested that there is a possibility of C. augusti- 

 folia, C. Mainiii, and C. ohtu:<a, especially the first, with its many varieties being 

 the outcome of the two extremer species C. coriacca and ('. romata, the former 

 from Kauai, the latter from ]\raui. 



In regard to the species of section two, it has already been stated that they 

 are all peculiar to Kauai, and may be grouped as to their affinities, showing their 

 scala of evolution, or better, range of satellitic offsprings as follows: Vyanea 

 fissa, C. Knudsenii, C. sylvestris, all three broad-leaved plants, Cyaiica Gaijana, 

 C. hirtella, C. rivularis. with more oblong lanceolate leaves to C. recta, (!. undu- 

 lata, C. Larrisonii with from broadly lanceolate to linear lanceolate leaves. 



Of the six species which form the section [lilosni , one, ('. Cojirlandii, is in- 

 eluded with some doubt, while in other respects belonging to this section it 

 lacks more or less the general characteristic, as the dense clustering of the fioral 

 racemes around tlie fieshy stem below the leaf-whorls. This is however less 

 striking in a variety of C. pilnsa. the type of this section, var. (jJahrifolid from 

 Hawaii. 



This section is distril)iited over four islands and finds in ('. )ii iilt ispicaia, 

 with no known varieties at present, its sole representative on the most distant 

 island, Kauai. Its closest congener can be found in Vyanea acmniiiata on (_)ahu. 

 On Molokai, the intermediate island between the former and ^laui, there is so 

 far no representative known, while on the latter island the section is represented 

 by C. BisJiopii which is closest related to ('. pllosa. and its many varieties, found 

 on Hawaii. The latter species may be looked upon as the youngest and still in 

 the process of evolution. This may be accounted for by the various regions of 

 Hawaii in which this plant grows, as for examjile, the extreme southern forests 

 of Naalehu, Kau, with moderate rainfall, the forests of Kilauea, with a moi-e 

 constant rainfall, and the .swampy moss-covered rainforests of the oldest portion 

 of the island of Hawaii, the Kohala mountains. Quite different is it with 

 ('. CoprJandii. All the other species are terrestrial, while C. Copclandii is semi- 

 epiphytic, its semi-fleshy stem is often found ascending the mo.ss-eovered trunks 

 of trees and attaching itself by means of roots which extend the whole length of 

 its prostrate stem. 



All species of this section are unbranched and subherl)aceous, the only excep- 

 tion being C Copclandii, which sometimes branches from the common rootstock 

 and sends out long rambling or scandent branches. They ai)proach the species 

 of the next following section, ('. (j( iniiiiac. 



SECTION CYAXEAE GENUINAE. 



This section, the writer found it convenient to divide into two subsections : — 

 scabrac, and nhdjriflorac. The former possesses four species, the latter five. The 

 writer considers that this section represents the youngest group of ITawaiian 

 Cyaneae. ^Yith the exception of f'yaiKa solaiiacKi, which occurs on IMolnkai, 



