Compositae. 

 KEY TO THE GENEEA. 



Flowerheads small, yellowish: 

 Style of fertil flowers bifid: 



Bracts of involucre in one row free Dubautia 



Bracts of involucre connate Eaillardia 



Elower heads large, two inches or more, brownish yellow: 



Style of all florets entire or shortly bidentate Hesperomannia 



DUBAUTIA Gaud. 



Elowerheads homogamous, discoid, all florets hermaphrodite and fertile. Involucre 

 turbinate, with 5 to 10 equal bracts in one row; receptacle naked or paleaceous, the 

 paleae corresponding in number to the inner florets; corolla tubular with a 5-fid limb; 

 anthers purple, shortly appendiculate; style-branches revolute; achenes hispid, 4 to 5 

 ribbed, with several shortly ciliate rays in a single row. — Shrubs or small trees with op- 

 posite or ternate leaves which are either sessile or subsessile, the leaves are paralle\ 

 nerved, with a slightly branching middle nerve, and remind one of tlie leaves of species of 

 Plantago or Bupleurum. Inflorescence terminal, paniculate or corymbose. 



The genus Dubautia is strictly Hawaiian and is closely allied to the genus 

 Eaillardia, which is also peculiar to the Hawaiian Islands. It consists of seven 

 species, only two of which attain the height which entitle them to be called trees ; 

 the remaining five are shrubs. The Dubautiae or Naenae, as the Hawaiians term 

 these plants, are peculiar to the wet regions of the middle forest zone, and reach 

 their best development on the Island of Kauai, where five species are found. 



Dubautia plantaginea Gaud. 



Naenae. 



(Plate 211.) 



DUBAUTIA PLANTAGINEA Gaud. Bot. Voy. Uranie (1826) 469. pi. 84;— Less in Lin- 



naea VI. (1831) 162;— Endl. Fl. Suds. (1836) n. 998;— A. Gray Proc. Am. Ac. 



V. (1862) 134;— Wawra in Flora (1873) 76;— Hbd. Fl. Haw. Isl. (1888) 222;— 



Hofemann in Engl, et Prantl Pflzfam. IV. 5. (1889) 248. fig. 120. G.;— Del Cast. 



111. Fl. Ins. Mar. Pac. VI. (1890) 212; — Heller in Minnes. Bot. Stud. Bull. IX. 



(1897) 918. 



Leaves opposite, lanceolate 10 to 20 cm x 8 to 20 mm, acute gradually contracting at 



both ends, clasping with the narrow base, entire or remotely denticulate in the upper' 



half, strongly 7 to 13 nerved; panicle pubescent, pj'ramidal, 15 to 25 cm long, projecting 



beyond the leaves, with horizontal branches, the lowest 5 to 7.5 cm long, the ultimate 



pedicels 2 to 3 mm, racemosely arranged; heads cylindrical, florets 7 to 10, involucral 



bracts 7 to 8; receptacle mostly naked; corolla orange colored, exserted; style branches 



revolute; pappus-rays linear-subulate, with upright ciliae. 



The Naenae is a small tree of 10 to 16 feet in height with a short trunk of a 

 few inches in diameter. The branches are very slender, spreading, and bear at 

 their ends long, lanceolate, bright-green opposite leaves, which are strongly 7 to 

 13 nerved. It is a strikingly handsome tree when in full flower, which is from 

 about July to August, varying, of course, according to locality. The small yellow 

 flowers are borne on a large pyramidal panicle which projects beyond the leaves, 

 about ten inches or more in length, drooping or standing erect. The corolla is 

 orange-colored with a slender tube which dilates into a bell-shaped (campanu- 

 late) limb with reflexed lobes. The flowers have the odor of bee's-wax, and are 

 often purplish instead of yellow. 



499 



