ARTIFICIAL KEY TO THE NATURAL ORDERS. 



XIX 



PASSIFLORACE^, 138 

 SAXIFRAGAGE^, 141 



PAPATERAOBa;, 24' 

 OAPPAEIDAOB^j 40 



PARNASSIAOE^, 48 



DROSBRACE^, 47 



CISTACEai, 45 



LeaTes with stipules. Seeds single or few, destitute of albumen. ROSACE.^:, 110 



LeaTes destitute of stipules. Seeds with albuuneu. 



Pistils 2, fewer than the (5, or rarely 4) petals. SAXIFRAGACEiE, 142 



Pistils 3-5, of the same number as the petals. OBASSULACEiB, 139 



Stamens connected with the stigma, which unites the tops of 2 pistils. ASOLBPIADACB^, 350 



■•- -t- Pistil OTUj compound ; the ovary l-celled. 



Corolla irregular, of 4 petaJs. Stamens 6, collected in two sets. PUMARIACE^, 26 



Corolla irregular, of 5 petals. Stamens 5 ; their broad anthers united. VIOLACEZE, 41 



Corolla regular: OTule solitary from the base. Leaves alternate. ANARCARDIACB^, 76 



Corolla regular : OTules from the base or axis. Leaves opposite. CARYOPHYLLACE^, 53 



Corolla regular : ovules few or many on 2 - several parietal placentae. 



Stamens monadelphous, their tube sheathing the stalk of the ovary. 



Stamens separate, inserted on the calyx. 



Stamens separate, Inserted on the receptacle. 



Sepals 2, caducous. Juice milky or colored. 



Sepals 4, deciduous. Style 1. Juice not milky. 



Sepals 5, or sometimes 3, persistent. 



A cluster of sterile filaments placed before each petal. 



Sterile filaments or appendages none. 



Styles 6 or 10, double the number of the placentae. 



Style 1 or none : stigmas 1 - 3 : placentee 3. 



•»--»-■»- PisUl one, compound ; the ovary 2 - \Q~celled. 

 H-*- Flowers irregukar. 

 Stamens 6 or 8 in two sets, connected with the petals : anthers l-ceUed. POLYOALACB^, 85, 

 Stamens 10, distinct, free from the petals : anthers 2-ceUed. Rhodora in BRICAGB^, 245-' 



Stamens 6-8, distinct, free from the petals : anthers 2-ceIled. SAPINDAGB^, 82 



Stamens 6 : anthers connivii^ over tbe stigma, 2-celled. BALSAMINAGB^, 73 



++ •♦+ Flowers regular or TiearVy so. 

 Stamens (mostly 2) fewer tlian the 4 petals. 

 Stamens more numerous than the petals, but not twice as many. 

 Of ecLual length. Corolla not cruciform. 



Two stamens shorter than the 4 others. Corolla (of 4 petals) cruciform. 

 Stamens just as many or twice as many as the petals. 

 Ovules and seeds only 1 or 2 in each cell. 

 Herbs. Flowers monoecious. Styles fewer than the sepals. 

 Herbs. Styles or stigmas as many as the petals or sepals. 

 Sepals, petals, and lobes of the ovary 3. Stamens 6. 

 Sepals and petals 6. Ovary and pod 10-celled. 

 Sepals, petals, and cells of the ovary 5. Stamens 10 or 5. 

 Shrubs or trees. 

 Bruit a fleshy colored pod. Seeds enclosed in a pulpy aril. 

 Fruit 2-W)nged. Leaves opposite. Aril none. 

 Fruit a 4 ~ 8-seeded drupe. Leaves alternate. 

 Ovoles (and usually seeds) several or many in each cell. 

 Stipules between the opposite and simple leaves. 

 Stipules between tbe opposite and compound leaves. 

 Stipules none when the leaves are opposite. 

 Stamens 5, monadelphous in a 10-toothed tube or cap. 

 Stamens 10, monadelphous at the base. 

 Stamens distinct, free from the calyx. 

 Style 1, undivided. 

 Styles 2-5, separate. 

 Stamens distinct, inserted on the calyx. 

 Style 1. Pod enclosed in the calyx becoming 1-celled. 

 Styles 2 (rarely 3), or splitting into 2 in fruit. 



OLBACE^, 356 



ACBRINEffi, 84 

 CRUCIFBRa], 28 



EUPHORBIACBiB, 385 



LIMNANTHACE^, 74 



LINACEiE, 70 



GBRANIACEiE, 72 



CELASTRAOE^, 81 



ACBRII^E^, 84 



AQUIFOLIACE^, 263 



ELATINACEiE, 52 

 STAPHYLBACES:, 83 



GALACINEiE, 262 

 OXALIDACE^, 71 



BRICACB^, 245 

 CARYOPHYLLACEiE, 52 



LYTHRACEffi, 127 

 SAXIFKAaACEiE, 141 



