150 KEY TO SUB-CLAS3ES, ORDERS AND GENERA, 
XLIII—LEGU MINOS 4-—cont. 
(A) Flowers in globose heads ; pod faleate, thick, woody ,septate with- 
in, tardily dehiscing ; tall tree :— gu sé ecclyiii— Xylia. 
(B) Flowers in cylindric spikes ; pod very long ligulate, breaking into 
l-seeded joints, seeds very large ; tendrilled cliraber :— ccclix—Entada. 
(2) Leaflets alternate; flowers in racemes; pod torulose, septate within, 
seeds usually red; tree:— ... Oy ag a ee cceclx— Adenanthera. 
(ii) Thorny trees; leaves bipinnate ; flowers in cylindric spikes :— 
(1) Pinnae 2 pairs; leaflets small, 7—-i0 pairs; spikes 1-coloured :— 
ecelxi—Prosopis. 
2) Pinnae 6—10 pairs; leafiets very small, 12--15 pairs; spikes 2- 
coloured :—— ans Heh BA. Bie see oe ecclxii—Dichrostachys. 
(IL) Stamens 8, 10, or many, anthers without glands :— 
(i) Stamens 10, monadelphous; flowers in large heads; pod large, flat, 
iigulate ; leaves bipinnate, pinnae and leaflets very numerous :— ecelxiii— Parkia. 
(ii) Stamens 8 or 10, free; flowers capitate; pods thin, coriaceous; leaves 
bipinnate :— ' 
(1) Pod continuous ; flowers white; unarmed :— ... ceclxiv—Leucena, 
(2) Pod disarticulating into 1-seeded joints; flowers pink; thorny :— 
ecclxy— Mimosa 
(ii) Stamens many, free; flowers in cylindric spikes or globose heads ; 
leaves bipinnate ; thorny trees and climbers :— ss <a) ceclxvii— Acacia. 
(iv) Stamens many, monadelphous :— 
(1) Pod not septate between the seeds:— 
(A) Pod thin, straight, indehiscent, or if dehiscent the valves not 
opening elastically, sutures thin : leaves bipinnate ; unarmed trees :— 
ecelxviii—Albizzia. 
(B) Pod faleate, revolutely dehiscent, the valves opening elastically 
from apex to base, sutures much thickened ; unarmed :— 
(a) Leaves bipinnate :— es 15: 0 .. ¢ececlxix~—Calliandra. 
(b) Leaves simple pinnate :— ae ast abe cecelxxii—Inga. 
(C) Pod circinate cr twisted ; leaves bipinnate ; armed or unarmed :— 
ccelxx--Pithecolobium. 
(2) Pod septate between the seeds, indehiscent, valves spongy or fleshy, 
sutures thickened ; leaves bipinnate ; unarmed: -- ... ¢ecclxxi—Enterolobium. 
XLIV.—ROSACEAI— 
[Anatomical features.— Apart from medullary rays, parenchyma does not form an 
important part in the wood of this order, The tribe CorysoBALANEx£ —Chrysobalanus, 
Parinartum,—is exceptional, they have narrow tangential bands of parenchyma in the 
wood. In this respect, as well as in the more or less zygomorphic flowers of the 
majority, this tribe approaches LeGumINos%, In this order the wood fibres have not 
as a rule bordered pits. As far as known, the wood of climbing species has a normal 
structure. | 
(1) Ripe carpels not enclosed within the calyx-tube :— 
(i) Leaves simple, quite entire; carpel 1 :— 
(1) Flowers usually zygomorpbic, calyx tube elongate; stamens 6--30, 
usually 1-lateral; carpel 2-celled :— a8 ay ... ecclxxiii—Parinarium. 
(2) Flowers regular; calyx campanulate; stamens about 20 in a regular 
whorl; nut 1-celled:— .. He i ao ecclxxiv—Chrysobalanus. 
(ii) Leaves simple, serrate ; fruit a drupe :—— : 
(1) Carpel 1 (rarely 2) :-— 
(A) Calyx 5-lobed; petals large :— 
(a) Style terminal; stone of drape hard, bony :—— .. cceclxxy——Prunus, 
(b) Style basal; endocarp of drupe coriaceous :—- ccelxxvii—Prinsepia. 
(B) Calyx 5——10-toothed; petals minute or O; endocarp of drape 
coriaceous : — ... ecelxxvi—Pygeum. 
(2) Carpels usually 5, free or connate below 5 fruit a capsule :— 
(A) Seeds linear, stamens 20—60 :— - 
(a) Flowers corymbose, small, white or pink :— ... eecelxxviii—Spirea. 
(b) Flowers solitary or few, large (usually double), yellow :— 
ecelxxxi—Kerria. 
(B) Seeds winged ; stamens 10 in 2 rows ; flowers white, 1—38 on the 
pedicel :— 36 eee 0 an tt ‘.. ecelxxxii—Quiliaja. 
