308 A FLORA OP MANILA 



ranked, alternate, prominently 3-neryed, nerves sometimes more numerous, 

 entire or toothed. Cymes axillary, peduncled. Flowers small, perfect 

 Calyx 6-fid, the lobes spreading or reflexed. Disk lobed, flat, or pitted, 

 the margin free. Stamens 6. 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 46 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. jujiiba 

 1. Cymes peduncled. 

 2. Leaves very strongly inequilateral at the base; drupe glabrous, the stone 



4-celled ; 2. Z. trinervia 



2. Leaves equilateral or slightly inequilateral at the base; drupe rusty- 

 pubescent, the stone 2-celled _ 3. Z. zonidata 



1. Z. JUJUBA Mill. Manzanas, Manzanitas (Sp.-Fil.). 



A small tree 6 to 19 m high, the branches armed with short sharp 

 spines. Leaves elliptic-ovate, rounded, green and glabrous on the upper 

 surface, beneath densely wooUy-tomentose with pale hairs, 5 to 8 cm long, 

 3 to 6 cm 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. (Fl. Filip. pU 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 bran\:hes, 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. (Fl. Filip. pi. iSS, Z. Mm.) 



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 6 cm 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. 



