94 



represented onl>' by a rather doiihtfnl variety on Maui, all of the remaining 

 species occur either on ilaui or Hawaii or on both islands; one species ('. Grimr- 

 siana even ranging from Oahu, and ]Molokai, to Maui, with a variety on Hawaii. 

 All the species of this section have a proneness to lobed leaves, in fact are lobed 

 in their young state; gradiuilly, after becoming more mature, their leaves are 

 notched. In Cyanea Grimesiaiia. the widest distributed species over this island 

 group, is represented the extreme type with perfectly pinnate leaves. The ten- 

 dency of lobed or sinuate or even pinnate leaves occurs in both subsections. 

 though the corolla in one subsection is muricate, and in the dllicr perfectly 

 glabrous. All species are more or less spiny along the stem, or at least muricate, 

 a character found again in a few species of the section, palmae formes. Of the 

 first subsection the species Cyanea scabra is the most variable; all gradations exist 

 from entire to deeply pinnatisect leaves, from smooth petioles and stems to 

 densely muricate ones, while the corolla remains unchanged. 



C. JwlopliyUa and C solanacea are next closely allied, with C. a^pJcnifoUa 

 following. It seems, however, curioiis that the latter species, which is nearer to 

 (J. Grimesiaiia, than to any other in this sectit)n, should have muricate corolla- 

 lobes, while those of the latter are smooth ; in aspect and general habit they are 

 alike, differing however in the corolla, which in C. aspleiiifolia is narrower, with 

 muricate lobes, and also in the linear lanceolate acute ealycine lobes, while 

 those of C. Grimesiaiia are broader, with smooth lobes, and in the ealycine lobes, 

 which are large foliaceous. 



Cyanea platypliylla is very close to C. seabia, differing in the glabrous 

 corolla. C. fcrox, with deeply lobed leaves, is an exceedingly spiny species and 

 must be classed as the next closest relative to C. Grimesiaiia, though somewhat 

 ditferent in habit, i1 lieing a tall branching slii-iili with ascending, prieldy. bi-ittle 

 branches. 



C. tinlinu tiuiiiere is an exaggeration of C. pJiil ypliylla. the former being 

 spiny all over bdt h leaf-surfaces, as well as stem and petioles, to such an extent 

 that it is impossible to touch them with bare hands; the Howers are white- 

 greenish and perfectly smooth. 



On Hawaii and ]\lani this section seems to have reached its liest development, 

 but is still in the process of evolution, which is well illustrated by C. scabra, 

 while C. Grimesiaiia seems to lie a rather settled type occurring farthest away 

 (Oahn) from its congeners, witli a few varieties on Maui and Hawaii. 



THE SECTION I'AUJAEFOHMES. 



The section palmaeformes jjossesses the most interesting species of the genus 

 Cyanea and, as has been remarked, represents the oldest type of Cyanea. A very 

 unique plant is Cyanea iepieisteejia, which reaches a height of forty feet, with 

 a single stem abdul thi'ee inehes in diaiiii'ter and a large crown of leaves at the 

 apex, the leafs- crown having a diameter of often five feet or even more. 



Here again we find the most settled species on old islands such as Kauai, 

 Oahu. and Maui, \\liile on Hawaii twn species occur C. I riloimuil Iki and C. Gif- 

 farelii. the former is however very closely related to ('. maemsteyia of Maui, 

 while the latter represents an exeeedinyly old tyiie related to C. superba of Oahn. 



