EUPHORBIACEAE 921 
elastically from the columella. (Named after Euphorbus, physician to 
King Juba.) 
Species about 600, in all parts of the world, about 10 in the Philippines. 
1. Erect branched shrubs or undershrubs with stout, often fleshy branches, 
armed with stipular spines. 
2. Very coarse, the branches very stout, 4- or 5-angled, the spines less 
than 4 mm long, from thickened bases; leaves 5 to 30 em long. 
1. EL. trigona 
2. Branches less than 1 em thick, the spines 4 to 12 mm long; lobes of 
the involucre red; SmOWwy. sc. Sk Eiri, erence 2. HE. splendens 
1. Erect unarmed shrubs with slender cylindric branches which are green 
andi nearly: lémtanas 25.4. tt Lie ek thc oe 3. EB. tirucalli 
1. Erect, unarmed, leafy shrubs or herbs, with terminal cymes subtended 
by showy colored bracts or bract-like leaves. 
2. Herbaceous or suffrutescent; leaves 3 to 10 ecm long, irregularly 
lobed, the bracts green and red...............---0.2.:-+00++ 4, E. heterophylla 
2. An erect shrub; leaves 10 to 18 cm long, the bracts large, uniformly 
pS 2 ER a IRE co OT ae Oey orto 5. EB. pulcherrima 
1. Erect, spreading, or prostrate, unarmed herbs, the flowers in axillary 
cymes or fascicles. - 
2. Erect glabrous herbs with rather lax cymes, the limb of the involu- 
cral-gland white, small but conspicuous. 
8. Leaves linear, 1.5 to 6 cm long, serrulate.................... 6. E. serrulata 
3. Leaves elliptic to oblong, somewhat oblique, 1 to 1.5 cm long, very 
PATA PRUE RHINE tan Been sb kewm ac Ages cap 7. HB. hypericifolia 
2. Prostrate or spreading plants with short, densely flowered cymes or 
fascicles, the limb of the involucral gland none or inconspicuous. 
8. Leaves 1 to 2 cm long; plants prominently hirsute or hispid- 
il oe Hae TOS 13s a NRA Re ase epee SAMMI SURE Fev ee er et 8. E. hirta 
3.. Leaves less than 1 cm long; slender, nearly glabrous or only slightly 
pubescent plants. 
4 Capsules: pubestontes s:sic2c6c cit ks 9. EB. thymifolia 
4. Capsules hispid-ciliate-on the keels of the cocci, otherwise glabrous. 
10. EF. prostrata 
1. E. trigona Haw. Sorog-sorog (Tag.) ; Suda-suda (Vis.). 
A shrubby, erect, branched, fleshy, cactus-like plant 2 to 4 m high, the 
trunk and older branches grayish, cylindric, the medium branches slightly 
twisted, stout, fleshy, 4- or 5-angled or winged, the younger ones usually 
3-winged, the wings lobulate, with a pair of stout, sharp, 2 to 4 mm long 
spines from thickened bases at each leaf or petiole-scar. Leaves from the 
sides of wings toward the ends of the branches, fleshy, oblong-obovate, 
obtuse or acute, 5 to 15 em long, or in young plants somewhat longer. 
Cymes short, solitary in the sinuses, usually of 3 involucres, the involucres 
green or pale-yellow, about 6 mm in diameter, the lobes fimbriate. 
Occasionally cultivated for ornamental purposes, fl. March; widely dis- 
tributed in the Philippines in cultivation, and in some provinces apparently 
indigenous. India to Malaya. 
* 2. E. SPLENDENS Boj. Corona de espinas (Sp.); Crown of Thorns, 
An erect branched shrub 1 m high or less, the branches grayish, cylin- 
dric or obscurely angled, armed with slender, sharp, spreading, 4 to 12 
mm long spines. Leaves few, alternate, oblong-obovate, obtuse or apiculate- 
