LEGUMINOSAE 227 
Rarely cultivated, Singalon, fl. April-May. A widely distributed en- 
demic species yielding a valuable timber. 
4. ACACIA Willdenow 
Spinose or prickly, rarely unarmed, erect or climbing shrubs or small 
trees. Leaves bipinnate, the leaflets numerous, small, or in one Philip- 
pine species represented by phyllodia only. Flowers 5-merous, usually per- 
fect, in globose, axillary, solitary or panicled heads. Calyx toothed, cam- 
panulate or funnel-shaped. Petals exserted, united below. Stamens many, 
free, exserted. Ovary many-ovuled. Pod ligulate or oblong, not jointed, 
flat or swollen, dehiscent or indehiscent. (Ancient Greek name of a spiny 
Egyptian tree.) 
Species about 450 in all tropical countries, 5 in the Philippines. 
Erect ‘shrubs; pods) tured: ia. ie el a eas kik 1. A. farnesiana 
Climbing ‘shrubs; pods latin Wi. 28nn ABR a ac. 2. A. rugata 
1. A. FARNESIANA (L.) Willd. Aroma (Sp.-Fil.). 
A much branched spiny shrub 2 to 4 m high, the branches more or less 
zig-zag, lenticellate, the spines stipular, sharp, 1 to 4 cm long, those on the 
branchlets smaller. Leaves 5 to 8 cm long; pinnae usually 10 to 12; leaflets 
linear-oblong, 15 to 40,4 to 7mmlong. Heads axillary, solitary or fascicled, 
globose, densely many-flowered, about 1 cm in diameter, the peduncles slen- 
der, pubescent, 2 to 3.5 cm long. Flowers yellow, fragrant. Pods turgid, 
5 to 7 cm long, 1 to 1.5 em wide, straight or curved. 
In waste places, common, fi. Oct.-May; widely distributed and abundant 
in the Philippines, thoroughly naturalized. Probably a native of tropical 
America, now found in most tropical countries. 
2. A. rugata (Lam.) Ham. (A. concinna DC.). 
A scandent, prickly shrub reaching a height of 4 to 5 m. Branches 
gray, armed with short, sharp prickles. Leaves 15 to 25 em long; pinnae 
8 to 10 pairs, the rachis with one gland near the base and one or two 
near the apex; leaflets 20 to 32 pairs, linear-oblong, 8 to 10 mm long, acute, 
base subtruncate, midrib oblique. Panicles terminal and in the upper axils, 
ample, the heads yellow, about 1 cm in diameter. Pod straight, somewhat 
fleshy, wrinkled when dry, flat, 7 to 10 cm long, about 2 cm wide. 
In thickets on dry bluffs opposite Fort McKinley, fl. March; of local 
occurrence in Luzon. India to China and Malaya. 
5. LEUCAENA Bentham 
Small, erect, unarmed trees. Leaves evenly bipinnate, the leaflets small. 
Flowers sessile, in dense, globose heads, 5-merous, usually perfect. Calyx 
eylindric-campanulate, shortly toothed. Petals valvate, free. Stamens 10, 
free, much exserted; anthers not gland-crested. Ovary stalked. Pod flat, 
coriaceous, strap-shaped, thin, dehiscent. (Greek “white.’’) 
Species 8, mostly American, the following introduced in the Philippines. 
1. L. GLAUCA (L.) Benth. Malaganit, Ipel or Ipel-ipel (Tag.). 
A shrub or small tree 2 to 6 m high. Leaves 15 to 25 cm long, rachises 
pubescent; pinnae 8 to 16, 5 to 9 cm long; leaflets 20 to 30, linear-oblong, 
acute, inequilateral, 7 to 12 mm long. Heads solitary, axillary, long-pedun- 
cled, globose, densely many-flowered, 2 to 5 cm in diameter. Flowers white. 
Pod thin, flat, strap-shaped, acuminate, 12 to 18 cm long, 1.4 to 2 em wide, 
usually many developing from each head of flowers, each containing from 
15 to 25, elliptic, compressed, shining, brown seeds. (FI. Filip. pl. 400.) 
