Sapotaceae. 
oceurring in S. rhynchospermum Rock. They are ovoid and of a deep purplish 
black color. The fruits of S. sandwicense (Gray) B. & H. are pear-shaped to 
ovoid and also black and long peduneled, while those of 8S. awahiense Rock and its 
varieties on Hawaii are bright citron yellow, globose to top-shaped and sessile. 
The writer has collected large material of this genus from numerous localities. 
That S. auahiense is a good species is brought out by the fact that the latter 
grows in company with S. sandwicense with black ovoid fruits on the lava fields 
of Auahi, Maui, and nothing is more in contrast than to see these two species 
growing side by side, especially when loaded with respectively the bright yellow 
and the black fruits. On the slopes of Haleakala, back of Makawao, the writer 
collected specimens of a tree with large cone shaped, whitish-gray fruits, whose 
seeds differ decidedly from all the other Hawaiian species, while in the same 
locality only 50 yards off grew the typical S. sandwicense. 
On Molokai occurs a very small-leaved species, which was unfortunately not 
in fruit, perhaps a form of S. spathulatum Hillebr. from Lanai. On the latter 
island the writer collected the largest leaved Sideroxylon with long pear-shaped 
black fruits. Another form was in flower only, the latter being of exceedingly 
large size compared with the other Hawaiian Sideroxyla. All the specimens col- 
lected by the writer on Kauai are one seeded, while those from the other islands 
are all five seeded, save a few exceptions. 
The Hawaiian species of Sideroxylon may be arranged as follows: 
KEY TO THE SPECIES. 
Flowers 2 to 4, in clusters, pedicellat 
Fruits globose ovoid to obovate, ar pliak black. : 
Seeds thick, rounded at both ends..........----++eeee0e9> S. sandwicense 
Seeds thin fat, beaked at both CNEREE es eee eet S. rhynchospermum 
Flowers single and sessil 
Fruits globose SiGe or orange yellow 
eek s as in S. sandwicense but smaller SINGS Ne epee a ar S. auahiense 
bs ellate. 
its conical, brownish yellow tum 
eeds s mall, linear- -elongate, seh es ee ees S. spathula 
Flowers mg ai pedice re 
Fruits large ¢ 1, grayish-whit ; 
Seeds g elliptical elongate, dull; “radicle long, protruding....-- Coen 
Sideroxylon sandwicense (Gray) Benth. & Hook. 
Alaa or Aulu, Kaulu according to Hillebrand. 
(Plate 153.) 
SIDEROXYLON SANDWICENSE (Gray) Benth. & Hook. Gen. Pl. IL. (1876) pares 
. FL. Haw. Isl. Gone 276;—Engi. in En e ot Pratl Pastas: = I ae 
i tg. 7 L (Sect. VIIL., in Nachtr. Sect. IX.);—Del_ Cast. ween. 
VEE (1892) ted — Mapes Sandwi ak Grey 6 5 (1875) Ad- 
—H Mann Proe. Am. Ac. VIL (867) 188; Wawra in Flora (1875) 
Lae 
Leaves coriaceous, obovate-oblong, on petioles of 2.5 to 3.5 em, equally rounded ® 
both ends, or races, box step sid a ite satire. old leaves glabrous 0 n both om often 
€lothed with a brownish See underneath, shining above, veins prominent — 
383 
