Myrtaceae. 



Linn. Soc. III. (1797) 268. M. spectabilis Gaertn. Fruct. I. (1788) 172, pi. 34. 

 fig. 9; Sol. Prim. Fl. Ins. Pacif. 263 (ined.) et in Parkins. Draw. Tali. PI. t. 54. 

 M. diffusa Hook, et Arn. Bot. Beech. (1832) 63, (non Smith). M. obovata 

 Hook, et Arn. Bot. Beech. (1832) 63. pi. 12. Melaleuca villosa Linn. 

 fig. m-p. Nania collina O. K. Rev. Gen. PI. I. (1891) 242. Nania pumila Heller 

 in Minn. Bot. Stud. Bull. IX. (1897)864. Nania glabrifolia Heller 1. c. 866. 

 Nania lutea Heller 1. c. 867. X Nania Fauriei Levl. in Fedde Eepert. X. 10/14 

 (1911) 150. x Nania Feddei Levl. 1. c. 150. N. polymorpha var. nummularifolia 

 Levl. Eepert. X. 10/14 (1911) 149. 



Branches angular or terete, tomento=e or glabrate; bracts of leaf buds short, scarlet, 

 early deciduous; leaves opposite on short or long petioles, lanceolate, oblong, ovate, obovate 

 or orbicuJar, at the base acute, rounded or cordate, glabrous or tomentose underneath, 

 with faint nerves; flowers in terminal cymose corymbs, pedicellate or subsessile, 3 on a 

 branchlet or peduncle, red, salmon, pink, or yellow, bractlets 3 mm caducous; calyx 

 turbinate, 3 to 5 mm, glabrose or tomentose, with deltoid or rounded lobes; petals 3 to 6 

 mm, oblong or obovate; capsule semi-adnate, at last almost free, 3-lobed, 3-valved, glabrous 

 or tomentose; seeds linear fusiform. 



The numerous varieties of Metrosideros polymorpha may be arranged into 

 three sections as follows : 



Sect. I. Glabrae. 



Leaves glabrous on both sides, calyx also glabrous. 

 Sect. II. Hemilanatae. 



Leaves glabrous on both sides, calyx silvery or whitish tomentose or woolly. 

 Sect. III. Tomentosae. 



Leaves whitish or grayish tomentose, calyx tomentose or woolly. 

 Sect. I. Glabrae. 



a ' Small plants usually only found at the summit swamps as on Mt. Puukukui, 

 and Mauna Eke on Maui, (no. 8145). 



Leaves small cordate, suborbicular, glabrous on both faces, strongly but finely reticu- 

 lated; calyx glabrous or here and there with a small patch of minute silky pubescence; 

 petals and stamens red, the former slightly ciliate at the margins. 



ft Trees on the main range of Oahu, at an elevation of 1000-2000 feet. Niu 

 Valley, (no. 4829), Pauoa. Valley (no. 1010), Manoa Valley. 



Leaves small ovate-elliptical, acute or rounded at the apex, tapering at the base into 

 a somewhat margined petiole; calyx perfectly glabrous, the lobes triangular acute, 

 branchlets red; resembles M. tremuloides. Inflorescence occasionally but sparingly 

 sprinkled with a silky pubescence. 



y Large trees, probably the typical M. polymorpha on the main range, Koolau 

 Mts. (no. 1279), Oahu; also from Kauai. 



Leaves elliptical to ovate-oblong, larger, glabrous on both faces bluntly acute, dark 

 green, with a straight marginal nerve, shortly petioled; calyx and corolla glabrous or very 

 finely pubescent, of a silky white. 



Sect. II. Hemilanatae. 



8 Trees or shrubs. Kamoku forest, Molokai, (no. 6181). 



Leaves ovate to ovate-oblong, obtuse at both ends, rather large, long petiolate, 

 glabrous on both faces with indistinct marginal nerve; calyx and pedicels densely white 

 tomentose, the rounded sepals green and glabrous, petals red and margins not ciliate. 



Creepers in swampy open places, or bogs, on Molokai, Kawela, (no. 5087 

 and 6097), resembles var. a sect. I. glabrae. 



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