308 A FLORA OF MANILA 
ranked, alternate, prominently 3-nerved, nerves sometimes more numerous, 
entire or toothed. Cymes axillary, peduncled. Flowers small, perfect. 
Calyx 5-fid, the lobes spreading or reflexed. Disk lobed, flat, or pitted, 
the margin free. Stamens 5. Ovary 2- or 4-celled, sunk in the disk 
and confluent with it at the base. Styles 2 or 4, free or more or less 
united. Fruit drupe-like, pulp fleshy or dry, the stone 1 to 4-celled, 1- to 
4-seeded. (From Sisyphus, a fabulous king of Corinth.) 
Species about 45 in temperate and tropical regions of both hemispheres, 
about 8 in the Philippines. 
1. Cymes sessile or subsessile, leaves pale beneath; fruit fleshy, edible. 
1. Z. jujuba 
1. Cymes peduncled. 
2. Leaves very strongly inequilateral at the base; drupe glabrous, the stone 
GI, oes gaa dack taeda sah ronceectiee eeaanes thes Seles eae eee 2. Z. trinervia 
2. Leaves equilateral or slightly inequilateral at the base; drupe rusty- 
pubescent, the stone 2-celled...........2...........2.c..2c0teesecceeseees 3. Z. zonulata 
1. Z. JusUBA Mill. Manzanas, Manzanitas (Sp.-Fil.). 
A small tree 5 to 19 m high, the branches armed with short sharp 
spines. Leaves elliptic-ovate, rounded, green and glabrous on the upper 
surface, beneath densely woolly-tomentose with pale hairs, 5 to 8 cm long, 
3 to 5 em wide. Cymes sessile or subsessile, axillary, pubescent, 3 cm in 
diameter or less. Flowers greenish-white, about 7 mm in diameter. Petals 
subspatulate, concave, reflexed. Ovary 2-celled. Fruit fleshy, ovoid or 
subglobose, 1.5 to 2 cm in diameter, edible. (FI. Filip. pl. 57.) 
Occasional in gardens and along roadsides, introduced, fl. July—Sept. 
‘A native of tropical Asia now distributed from Affghanistan to China, 
through Malaya to Australia, often in cultivation only. 
2. Z. trinervia (Cav.) Poir. Duclap (Tag.). 
An erect shrub or small tree, frequently with pendudous branches, rusty- 
pubescent, the trunk with large pyramidal spines. Leaves densely pubes- 
cent, ovate, 5 to 10 cm long, acute or acuminate, base very strongly inequi- 
lateral. Cymes short, axillary, solitary, peduncled, pubescent. Flowers 
greenish-white or greenish-yellow, about 4 mm in diameter. Fruit globose, 
glabrous, 1 to 1.5 cm in diameter, green, the pulp rather hard, the stone 
bony, 4-celled. (FI. Filip. pl. 433, Z. lotus.) 
In thickets, dry hills near the city, fl. June-Nov.; common and widely 
distributed in the Philippines. Endemic. 
3. Z. zonulata Blanco. Ligaa (Tag.). 
A tree, sometimes reaching a height of 25 m, more or less rusty-pubes- 
cent, the trunk with large pyramidal spines. Leaves ovate to oblong-ovate, 
acuminate, base rounded or subcordate, equilateral or slightly inequilateral, 
pubescent, in age often becoming glabrous or nearly so, 8 to 15 cm long. 
Cymes axillary, peduncled, pubescent, up to 5 em long. Flowers greenish- 
yellow, fragrant, 5 to 6 mm in diameter. Fruit globose, 1.5 to 2 cm in 
diameter, rusty-pubescent, the pericarp much wrinkled when dry, the bony 
stone 2-celled. 
Old botanical garden, fl. Sept._Nov.; widely distributed in the Philippines. 
Endemic. 
