Kky to the Familiks or Orders. 



I. «'al}X superior ()mIIi«t«'iiI I<» Hi*" ovnryK 



• Stamens united by their anthers. 



(. i< I KHiTACE-f:. — Tendril-bearing herbs S2 | 



CoMi'osiT.t;. — Flowers in heads, surrounded by an 



involucre 6"^ I 



LoBELiACK.*:.— Flowers not in heads. Corolla split 



down one side 83 



• • Stamens not united together in any loay, 

 •i~ Stamens inserted on the corolla. 



DiPSACK.*:. — Flowers in heads, surn.unded by an 



involucre. Plant prickly 63 



Valerian AC £.«. — Flowers white, in clustered 

 cymes. Stamens fewer than the lobes of the 

 corolla 63 



KcBlACE.t. — Leaves, when opposite, with stipules ; 

 when whorled, without stipules. Flowers, if 

 in heads, without an involucre 61 



CapkikkI-iace.*:. — Leaves opposite, without sti- 

 pules ; but. in one genus, with appendages 

 resembling stipules oS 



.( — t~Slamens not inserted on the corolla. 



CampantLACE.*. — Herbs with milky juice. Sta- 



metis as many as the lobes of the corolla 63 



EuiCAiK.*:.— Chiefly shrubby plants or parasites. 

 Stamens twice as many as the lobes of the 

 corolla ^5 



B. Calyx Inferior <rreo from Ihe ovnrjK 



• Stamens more than the lobes of the corolla. 



htaVMiTiosjR. — Ovary 1 -celled, with 1 parietal 



placenta. Stamens mostly diadelphous .33 



Adlnmia, in 



FiMAKiAiE.*. — riantclimbing. Corolla 2-spurred. 11 



Malvack.*:. — F'ilaments monarlelphous. Carpels 



in a ring 24 



ERiCArK.r-— Chiefly shrubby plants, with simple 

 entire leaves. Stamens twice as many as the 

 lol>es of the corolla **•'"' 



PoLYOAi«vCE.«. — Anthers 6 or 8, 1-celled, opening 

 at the top. Foil 'i-celled. Flowers irregular ; 

 lower petal keel-shaped,, and usually fringed 

 at the top " 32 



OxAMrM(K^.— Stamens 10, .5 of them longer. 

 Styles 5, distinct. Leaflets 3, obcordatc, 

 drooping at nightfall .... 27 



• • .Stamens just as many as the lohts of the, corolla, one 

 in front of tarh lobe. 



PRl»icl«vrK.«. — Stamens on the corolla. Ovary 

 1-celled, with a free central placenta rising 

 from the base 91 



• • • Stamens juxt as many a.t the lobes of the corolla, 

 inserted on its tube alternately wit/i its lobes. 



•i~0 caries 2, separate. 



ArocYNACE.t:. — Plants witli milky juice. Antliers 

 converging rouml tlie stignius, but not adlier- 

 ent to them. Filaments distinct 114 



AsoLEi'iADACK.t:. — Plants with milky juice. An- 

 thers adhering to the stigmas. Filaments 

 monadelphous. Flowers in umbels 114 



-i~-i~Ovary 4-^obed around the base of the style. 



Mentha, in 



Labiat.«. —Stamens 4. Leaves opposite, aromatic 100 



BoRR.\oiNACE.*;. — Stamens 5. Leaves alternate.. lO.^ 



H — i~ Ovary 1-celled ; the seeds on the walls. 



-Stamens o, usually exserted. 

 Leaves lobeil and sometimes 



HvURtll-HYM.ACE.E 



Style 2-ch-ft. 



cut- toothed 1 OS 



CiENTIAnace.*:. — Leaves entire and opposite ; or 



(in Menyanthes) of 3 leatlets 1 12 



■i--i-'i~-i-Ovary icith 3 or more cells. 



Aquifoliack^. — Shrubs. Corolla almost poly- 

 petalo\is. Calyx mimite. Fruit a reil berry- 

 like drupe. Parts of the Hower chiifly in 

 fours or sixes 90 



Pi-ANTA<;iNA«'E.t;. — Stamens 4. Pod 2-ceued. 



Flowers in a close spike 91 



Verbascum, in 



Siuoiini.AKiArE.t;. — Corolla nearly regular. 

 Flowers in a long terminal spike. Stamens 5 ; 

 the tilaments, or some of them, woolly 94 



PoLEMONiAfE.t;. — Style 3-cleft. Corolla salver- 

 shaped, with a loni; tube. Po^l 3-celled, few- 

 seeded ; seetls small 109 



CoNVOLVULACEiC. — Style 2-cleft. Pod 2-celled, 

 generally 4-s<eeded ; seeds large. Cliiefly 

 twining or trailing i)lant8 lOi) 



SoLANACEiK.— Style single. Pod or berry 2-celled, 



many-8eede<l 110 



« « • * Sfamms feirer than the InbrH of' the corolla ; the 

 corolla mostly irrnjiiiar or ^.'-li/i/ird. 



Laiuat.k. — Ovary 4-lobeil around tlie base of tl:o 

 style. Stamens 4 and didynamous, or occa- 

 Kionally only 2 with anthers. Stem square. . KK) 



VKRlsENAfK,*:. — Ovary 4-ccll(d, but not lobcd ; the 

 style rising from the apex. <fr, ovary 1-celled 

 and 1 -seeded. Stamens didynamous 99 



LENTiBrT.ArE.*;. — Aquatic. Stamens 2. Ovary 



1-celled, with a free central placenta 93 



Orobanciiacea;. — Parasitic herbs, without green 

 foliage. Ovary 1 celle<l. with many seeds on 

 the walls. Stanuns didynamous 94 



S<;ROpin"LAKlACE.K. — Ovary 2-celled, with many 



seeds. Stamens didynamous, or only 2 94 



