Rubiaceae. 



sandwicensis, various Sideroxylons and others. On Hawaii the writer found a 

 small tree on the lava fields of Puuwaawaa, elevation 2000 feet, North Kona, 

 while on Oahu it is recorded from Nuuanu and the dry forehills of Makaleha. 

 The wood of the Nau is whitish yellow. The yellow pulp of the fruit was em- 

 ployed in dyeing tapa, or kapa, yellow. 



Gardenia Remyi Mann. 

 Nanu or Nau. 



(Plate 178.) 



GARDENIA EEMYI Mann in Proc. Am. Acad. VII. (1867) 171; Hbd. Fl. Haw. Isl. 

 (1888) 172; Del Cast. 111. Fl. Ins. Mar. Pac. VI. (1890) 191; Brigham Ka Hana 

 Kapa Mem. B. P. B. Mus. III. (1911) 146. fig. 88. 



Leaves obovate oblong, 10 to 22.5 cm long, 5 to 10 cm wide on petioles of 4 to 8 mm, 

 shortly acuminate, contracted at the base, chartaceous, papillose underneath, prominently 

 nerved; stipules truncate and sheathing, flowers terminal, single, sessile; calyx-tube angu- 

 lar, 18 mm long with 4 to 5 lobes which are falciform, and dilated toward the oMuse 

 apex, net-veined, spreading with the plane vertical about 3 to 5 cm long, equalling or ex- 

 ceeding the corolla; corolla white, the tube 2.5 cm, the 7 to 8 obovate-oblong suberect 

 lobes about 20 mm long, narrowed at the base and separated by broad sinuses; anthers 

 enclosed; fruit 4 to 5-angled, pyriform, 3.5 to 5 cm, the permanent calyx-lobes surrounding 

 a disc 6 to 8 mm in diameter. 



The Nanu or Nau, unlike the afore described, is a tall tree reaching a height 

 of 20 to 40 feet with a rather large broad crown. The branches are more or 

 less horizontal in large trees; the trunk is short. The leaves which are larger 

 than in the foregoing species are light green and covered as with a layer of 

 varnish due to a glutinous substance which exudes from the young shoots. The 

 large sweet-scented flowers are terminal and single and have no flower stalk. 

 The fruit, which is quadrangular, is crowned by four wings, which are the per- 

 sistent lobes of the calyx, a characteristic which is absent in the other Hawaiian 

 Nau. 



The Nanu or Nau may be found on the slopes of Tantalus and especially in 

 Palolo Valley on Oahu, where it is a smaller tree, while on Molokai back of 

 Kaluaha large trees can be found in company with Acacia Koa (Koa), Bobea 

 elatior, Straussia Kaduana, etc. It grows on the leeward sides of some of the 

 islands and also in the rain forests on the windward sides, as for example on 

 Maui, where it is scattered between the valleys of Waikamoi and Honomanu 

 on the northern slope of Haleakala, where the rainfall is exceedingly large, as 

 well as on Kauai in the forests of Hanalei. Like the former it is endemic to the 

 Hawaiian Islands ; both species were discovered by Horace Mann and also de- 

 scribed by him in his "Enumeration of Hawaiian Plants"; the former he named 

 in honor of his companion, Prof. Wm. T. Brigham, the latter for the French 

 Botanist Jules Remy. 



The glutinous leaf buds were used by the natives as a cement, and the yellow 

 fruit-pulp for dyeing purposes. 



435 



