Sapotaeeae. 



sole, after whom the tree is named. Rock & Ceresole, March, 1912; type in 

 College of Hawaii Herbarium, No. 10150. 



A medium-sized tree 20 to 30 feet in height with straight ascending branches. 

 The fruit and seeds of this species differ very materially from all other known 

 Hawaiian Sideroxyla. 



Sideroxylon rhynchospermum Rock. 



Alaa. 



(Plates 154, 155.) 



SIDEROXYLON RHYNCHOSPEKMUM Eoek in Torrey Bot. CI. Bull. Vol. 37, 6. (1910) 

 295, fig. 2 & 3 a. b. et Report Hawn. Bd. Com. Agr. & For. (1911) 84, pi. 21. 



A tree 10 to 20 m Mgh, dividing freely into ascending branches; bark brownish, with 

 shallow, narrow longitudinal corrugations about 3 mm thick, trunk up to 45 cm in diam. 

 four feet from the ground; leaves coriaceous, obovate oblong 14 to 18 cm x 4.5 to 8 em, 

 on petioles 2.5 to 3 cm, alternate, exstipulate, quite glabrous with age, some pubescence 

 remaining on the sides and angles of midrib and veins, especially on the lower surface, 

 shining above, dull beneath, midrib prominent, with lateral veins leaving midrib at wide 

 angles, parallel and connected with a continuous intra-marginal nerve; young leaves 

 densely covered with appressed brown hair on both surfaces; Sowers in cluster 2 or 3 on 

 tomentose pedicels 12 to 20 mm long; calyx 5 parted to near the base, lobes acute, 3 to 5 

 mm; corolla light yellow, longer than the calyx, 4 to 5 parted to the base, lobes acute; 

 staminodia half as long linear; stamens 5, inserted at the base of the corolla, glabrous^ 

 anthers ovate, the cells confluent at the apex, opening laterally; ovary hirsute, 5-celled, 

 style short; fruit a purplish black plum-like berry 4.5 to 5.5 cm long, 3.5 cm wide, rather 

 fleshy, 3 to 5 seeded; seeds enclosed in a papery pyrena 25 to 30 mm x 12 to 14 mm, 

 perfectly flat, about 3 mm thick, beaked at both ends of the ventral angle, which is occu- 

 pied by the scar of the raphe, the crustaceous testa thin, of a light brown color. 



This rather handsome tree was first collected by Dr. H. L. Lyon in the woods 



of Nahiku, on the north-eastern slopes of Mt. Haleakala, Maui, at an elevation 



of 1300 feet. The species differs from the other Hawaiian Sideroxyla in the 



large black ovoid fruits and mainly in the very flat thin-beaked seeds. It grows 



in the rain forest of Nahiku, where precipitation is exceedingly heavy; while 



most of the other Hawaiian Sideroxyla are peculiar to the dry regions. When 



the writer visited the forests of Nahiku in the year 1911, the trees were neither 



in flower nor in fruit. The trees are not very abundant, but only individual 



trees could be seen scattered through the forest. 



Sideroxylon auahiense Rock. 

 Alaa. 



SIDEROXYLON AUAHIENSE Rock Coll. Haw. Publ. Bot. Bull. 1. (1911) 18. pi. 5. 



Leaves coriaceous, pale green, glabrous on both sides when old, shining above, covered 

 with a gray silvery tomentum when young, elliptical oblong, bluntly acuminate or rounded, 

 8 to 12 cm long, 4 to 6 cm wide, on petioles of 3 to 4 cm, veins parallel leaving midrib 

 at wide angles of about 80°; flowers single, rarely two in the axils of the alternate leaves, 

 calyx hirsute, 5 parted to near the base, the lobes rounded, corolla lobes 5, obtuse, 

 staminodia shorter than the lobes, 5, triangular; stamens wanting in the female flowers; 

 ovary hirsute with a dense circle of long reddish hair at its base^ 5-celled; style short 

 conical; berry sessile or subsessile, pale citron yellow, with a grayish hue, rather globose 

 with the apex drawn out into a short acumen; 3.5 to 4.5 cm in diam., bright yellow inside, 

 quite fleshy; seeds 20 mm long, 10 mm wide, enclosed in a thin papery pyrena, the thick 

 hard testa' pale yellow, with reddish spots, shining; the scar of the raphe shorter than the 

 ventral angle; cotyledons broad, the minute radicle inferior. 



387 



