138 KEY TO SUB-CLASSES, ORDERS AND GENERA. 
XXI--TILIACEAi—coné, 
(2) Fruit prickly, woody, triquetrous and slightly winged. |-seeded ; 
30 sr awe oc ee 50¢ acc or , cexx—Hrinocarpus, 
(8) Fruit prickly, small, globose, indehiscent or 3-—5-coccous ; shrubs :— 
cxxi—Triumfetta, 
tree :— 
(iii)—Sepals free ; petals not clawed :— 
(1) Fruit a cylindric capsule ; shrub :— 8 mee exxii—Corchorus, 
(2) Fruita fleshy drupe with 1 stone, 1 or more seeded ; trees :— 
cxxili—Hleeo carpus. 
XXII—LINACEA— 
(1) Stamens 5, staminodes 5;fruit acapsule:— ... ... cxxiv—Reinwardtia, 
(II) Stamens 10 ; fruit a drupe :— 
(1) Drupe globose, yellow, many seeded; branches wich circinate ten- 
dri) s)-)—— eee us asc a ss ok ae its sr cxxy—Hugonia. 
(ii) Drupe elongated, red, 1-seeded ; branches not tendrilled :— 
exxvi—Erythroxylon. 
XXUI—MaLPIGHUIACEA— 
(1) Petals clawed, unequal :— 
(i) Fruit fleshy, drupaceous, with 3-crested stones; calyx with sume 
segments Z-glandular at base; stamens 1 fertile; styles 3:—- ...  exxvit—Malpighia. 
(ii) Fruit of 1—3 samaras :— 
(1) Stamens 10 fertile, valyx with glands adnate to pedicel below it :— 
(A) Samaras each terminated by 3 long wings; petals 4 white 
and i longer coloured; style 1:— ... aro cexxviili—Hiptage. 
(B) Samaras each simply winged terminally ; petals 5, yellow; 
styles 3, stigma often foliaceous :— cxxix——Heteropteris. 
(2) Stamens 6 tertile, 4 staminodes opposite the calyx glands, calyx 
with 4 outer segments 2-glandular at base ; styles 3, stigmas foliaceous :— 
cxxx-—Stigmaphyllon. 
(11) Petals sessile, equal ; fruit of 3 nuts, each surrounded by an orbicular 
or oblong membranous wing ; stamens10; styles3 with capitate stigmas :— 
cxxxi—Aspidopterys, 
XXIV—ZYGOPHYLLACEA— 
[Botanical Note.—Peganum is sometimes placedin Order XXVI—RUTACEs as in 
Hooker, who however recommends its transference to this Order. | 
(1) Leaves paripinnate ; flowers bright blue; capsule 5-angled ; tree:— 
cxxxli—Guaiacum. 
(II) Leaves 1—3 foliate ; flowers mauve or pale rose; capsule 5-angled ; 
thorny shrub :— apc Re 500 ses oh 508 50° exxxili— Fagonia. 
({II) Leaves pinnatifid with narrow linear lobes ; flowers white , capsule 
globose ; unarmed shrup :—- eee . 500 bee oe cxxxiy—Peganum, 
XXV—GERANIACEA— 
(I) Leaves compound, pinnate, flowers regular , sepals imbricate ; fruit 
SB DeErnyt—— --c | nes ee Soe Bae ae ee ef: cxxxv——A verrhoa. 
(1{) Leaves simple, flowers irregular, sepals usually coloured and the posti- 
cous spurred ; fruit a capsule :— ves is se xe cxxxvi— Impatiens 
XXVI--RUTAC EA— 
[Anatomical featwres.—Cavities containing essential oil in the tissue of leaves, 
flowers and fruit, aS well as in tke bark, are an important characteristic of this 
order, separating 1t from MELIACE® and other allied orders. The ethereal oils, 
secreted in these cavities from the surrounding tissue, cause the aromatic scent of 
the RUTACE®; in most cases they can readily be seen as translucent glands. | 
[ Botanical note.--Genus cxciv—Chlororylon is sometimes placed in this Order. ] 
(I) Leaves opposite, simple or 1-foliate , unarmed :— 
(i) Stamens 5 alternating with 5 petaloid staminodes ; calyx 5-parted, 
petals narrow, spreading ; capsule winged, of 5 follicles each with 2 seeds :— 
cxxxvill—Calodendron, 
