xxii KEY TO THE ORDERS 
Anther-sacs E by slits. 
MED in Order GERANIALES. 
Anther-saes opening by pore 
Calyx and corolla very tremulum 
Order Boreas: 
Calyx and corolla regular. 
Families in Order ERICALES. 
Filaments distinct. 
Styles wanting or very short : stigma sessile. 
Aquifoliaceae in Order SAPINDALES. 
PESE elongated. 
vary several-celled. Families in Order ERICALES. 
iu ary 1-celled. Armeriaceae in Order PRIMULALES. 
oe Dar any connie to the corolla. 
Sta S many as dd d = the corolla and opposite them, 
Placentae central or basal. . Order PRIMULALES. 
Placentae parietal. 
Fouquieriaceae in Order HYPERICALES. 
Ovary several.celled.. 
Upper portion of the ovaries distinct. 
Sedaceae in id: ROSALES. 
Upper portion of the ovaries united. Order EBENALES. 
Stamens on many as the lobes of the corolla and alternate with them, 
ewer. 
Corolla not scarious, veiny: fruit various, but not a pyxis. 
eo 2 3-6 carpels. 
r trees: ovules and seeds few 
Aquifoliaceae in Order SAPINDALES. 
Herbs, or creeping or tufted m ubby plants: ovules and 
ds numerous or few some members of the 
eae. 
Stamens adnate up to the sinuses of the corolla : creep- 
ing evergreen under-shrubs, 
iapensiaceae im Order ERICALES. 
Stamens adnate to the lower part of the corolla-tube: 
herbs, undershrubs, or vines. 
Families in Order SDEHNMONIEUES: 
Gynoecium of 2 carpels. 
Carpels dicte except Sometimes at the apex 
yle ter minal. Order A EPIADALES. 
ty sie ‘basal. Dichondraceae in Order POLEMONIALES. 
Carpels united. 
Ovary 1-celled, with central placentae 
Order GENTIANALES. 
. Ovary 2- ‘celled, or falsely 4-celled, or if 1-celled with 
D placentae 
Stamens 2 and ODDoSite each other, or 3. 
Order OLEALES. 
Stamens ERR oe 4 e 5, if 2 by reduction. not oppo- 
site eac 
Leaves with stipules or stipular lines at their 
bas Spigeliaceae in SORTS EE GENTIANALES. 
Leaves with no e m stipu 
Fam io. POLEA MONIALES. 
Corolla scarious, veinless : fruit a Pris "Onde er PLANTAGINALES. 
Ovary ree ped 
Stamens with the filaments free from the corolla. 
Stamens 10: anther-sacs opening by ter minal pores or chinks. 
acciniaceae in Order ERICALES. 
Stamens 5 or fewer: anther-sacs opening by MEER e slits. 
Order CAMPANULALES. 
Stamens adnate to the corolla. 
Ovary with 2—many fertile cavities and 2—many ovules: calyx un- 
modified, at least not a pus. 
Plants tendril-bearin ng. 
ucurbitaceae in Order CAMPANULALES. 
Plants not tendril- beating 
Ovules mostly on basal placentae: plants parasitic. 
Order SANTALALES. 
Ovules m borne, but not on a basal Dn nta: plants 
not parasit RUBIALES. 
Ovary with one fertile cavity. 
Ovules numerous on a basal pod 
Prim RS in Order PRIMULALES. 
Ovule solitary, the placentae not porn 
Flowers not in heads, often in head-like spikes or racemes. 
Order P EE 
Flowers in involucrate heads. r CARDUALES. 
NG 7 
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