MAcCAUGHEY: GUAVAS OF HAWAIIAN ISLANDS §21 
up in the mountains and ravines, surrounded by. indigenous 
vegetation, and giving no hint of its exotic origin. It is quite dis- 
tinct from the common guava, in habit, foliage, and fruit, and un- 
doubtedly deserves specific, or at least subspecific, rank. It isa 
graceful, symmetrical, tall shrub or tree, with smooth trunk and 
branches, and a handsome crown of very dark green, glossy foliage. 
In favorable situations, where the humidity is sufficient; the 
Wai-awi guava attainsa height of 6-12 m., although ordinarily it is 
3-5-6 m. The leaves are small, oval, smooth and glossy, and are 
crowded towards the ends of the branches. The sprays of foliage 
are of distinct beauty. The flowers are white and very fragrant. 
The wai-awi guava is a prolific producer of fruit, and bears more 
or less continuously throughout the year. The fruit is small, 
2.5-5 cm. long, ovoid, and thin-skinned. It is rich, clear yellow 
in color, and the flesh is yellow and juicy. This variety does not 
form continuous scrub stands, but grows here and there, as isolated 
individuals or in small clumps. The birds feed eagerly upon its 
fruits and have carried it into nearly all the valleys. 
An interesting feature of the guava in Hawaii is that numerous 
forms of the endemic and highly precinctive arboreal molluscs 
‘(Achati nellidae), have migrated onto the guavas. Messrs. J. S. 
and Oliver Emerson, who have made large collections of the Hawai- 
ian snails, report that Achatinella phaezona, A. fulgens and its 
pblumata pattern, A. cestus and A. rutila, all occur in the ‘wai-awi 
guava, in such regions as Ke-awa-awa, Niu, and Wailupe Valleys. 
On the common guava they have found A. stewartii (adusta pat- 
tern), A. turgida, and Auriculella pulchra, the latter being ex- 
ceedingly plentiful. The nomenclature is that of Cooke and 
Pilsbry. 
5. THE GuISARO GUAVA 
The guisaro, P. molle Bertol., is also known as the sour gwisaro, 
or guayaba acida. It is native to Mexico and Central America 
but has been introduced into Florida and California. It was 
introduced into the Hawaiian Islands by Mr. A. Jaeger, and 
specimens occur in Honolulu gardens. The gwisaro is a low- 
growing, slender, straggling shrub or small tree. The young 
branchlets, peduncles, and lower surfaces of the leaves are reddish 
velvety. The leaves are oval-oblong, 7.5-12 cm. long, apex 
