KEY TO SUB-CLASSES, ORDERS AND GENERA. 123 
CALYCIFLOR Ai—cont. 
(+) Leaves opposite or if alternate, flowers not in heads; 
seeds many fertile :— “aa ... &LV—SAXIFRAGACE*. 
(tt) Leaves alternate; flowers in heads of 8—20 connate by 
their calyces; seeds 6 in each cell, lowest only 
fertile and winged (Bucklandia) :—KLV1—HAMAMELIDACE® 
(b) Carpels and styles united throughout; leaves exstipulate :— 
(a) Calyx lobes imbricate :— 
(*) Stamens indefinite; petals imbricate; anthers 
opening by slits; leaves usually opposite and 
gland-dotted, but not always:— XLIX—Myrrace#. 
(**) Stamens definite; petals valvate; anthers open- 
ing usually by pores; leaves opposite, not 
dotted, usually 3—5 nerved at base :— 
L—MELASTOMACER. 
(B) Calyx lobes valvate: stamens definite, rarely indefinite :— 
(*) Ovary free from calyx-tube, if adnate thereto 
(Punica) then stamens indefinite; petals usually 
corrugated :— = : ... LI—LyTHRACEA. 
(**) Ovary adnate, or semi-adnate, to calyx-tube with 
stamens definite :— At .. LII—OnasGRACE, 
(2) Ovules suspended from apices of carpels or loculi, ard always few ; 
ovaties almost always inferior, usually more than 1-locular :— 
(A) Ovoles more than one in each loculus, the flowers hermaphro- 
dite; or if ovules in each cell solitary, the flowers 1-sexzual 
(ComBRETACES [HeRNANDIACEX, Brandis} Gyrocarpus); styles 
united :— 
(a) Ovary 2—6 locular; leaves opposite; maritime species (except 
Carallia, Wethea and Blepharistemma) :— XLVII—RHIZOPHORACES. 
(b) Ovary 1-locular; leaves opposite or alternate; inland species 
(except Luwmmnitzera):— ... aoa ... SMLVIII—ComBRETACE. 
(B) Ovules 1 in each loculus ; flowers hermaphrodite :— 
(a) Flowers in axillary cymes or fascicles; fruit drupaceous with 
1—2 celled stone; leaves exstipulate, nearly entire :—LK—CoRNACEx. 
(b) Flowers in umbels; leaves stipulate, almost always alternate :— 
(a) Fruit somewhat fleshy ; carpels generally more than 2, never 
separating spontaneously, and without glandular vitte; 
leaves almost always compound, or if simple usually 
deeply lobed :— a. aoc x ... LIX—ARALIACE#. 
(B) Fruit dry ; carpels 2 separating spontaneously, usually with 
glandular vitte containing an essential oil :— 
LVIII—UMBE&LLIFER&. 
(ii) Ovary synearpous 1-locular with 3-4 parietal placentas with many 
ovules, usually free from calyx-tube, occasionally half-inferior (SamMyDacE4, 
Homalium) or inferior (DAtiIscace®) ; styles usually distinct, sometimes more or 
less united (SamypacE#, Casearia, and PassiFLoRACEz; lobes of calyx, petals, 
and stamens definite; flowers regular :— 
(1) Flowers hermaphrodite, or if 1-sexual (PassIFLoRACE®, Carica) with 
ovary superior :— 
(A) Flowers with a distinct corona between petals and stamens ; 
tendrilled climbers or (Carica) trees with 1-sexual flowers and 
superior ovary ; styles united at least below :— LVY—PassIFLoRACE®. 
(B) Flowers without distinct corona between petals and stamens :— 
(a) Sepals and petals dissimilar ; styles altogether free ; shrubs :— 
LIV —TURNEBACEZ. 
(b) Sepals and petals subsimilar; styles united at base or free ; 
trees:— bad Sa aa iad ... LITl—Samypacez, 
(2) Flowers 1-sexual or polygamous, with ovary inferior; segments of 
perinth minute; styles distinct, often 2 partite; leaves alternate, exstipulate :— 
LV I—Dartiscacez. 
(II) Stems fleshy, often flat and leaf-like, articulate, and leaves minute or 
reduced to spines, or if with woody stems and fleshy leaves (Pereskia), then 
with spines on the stem; flowers hermaphrodite, usually large ; calyx adnate to 
the ovary; lobes of calyx, petals, and stamens numerous; styles radiating at 
tip, united below ; ovary syncarpous, l-locular with parietal placentas :— 
LVII—Cactacez, 
