ANALYSIS OF THE NATURAL ORDERS. 195 



C Flowers in a compact head surrounded by an involucre. COMPOSITE. 7C 



c Flowers separate, irregular, perfect. Plants erect. LOBELIACE.S. 71, 



c Flowers separate, regular, imperfect. Weak vines. ORD. 58 



d Leaves alternate. Flowers 5-parted, regular, separate. CAMPANULACE^E. 72 



d Leaves opposite, with stipules between, or vertieiilate. KUBIACEJS. 67 



d Lvs. opp. Stipules none. Stam. 5 4. Ov. 2 5-celled. CAPRIFOLIACE^E. 66 



Stam. 23. Ov. 1-celled. VALERIAN ACEJS. 68 



Stamens 4. Flowers capitate. DIPSACEJS. 69 



e Herbs. Ovary with 5 styles and but 1 seed. PLUMB AGINACE 20. 80 



e Herbs. Ovary with 1 style and many seeds. PRMULACE.E. 78 



c Trees or shrubs. Ov. 1-styled, 5-celled, 1-seeded. SAPOTACE^E. 77 



- f Style none. Drupe 4 6 seeded. AQUIFOLIACEJS. 74 



f Style one. Drupe 4-seeded. VERBENACE^E. 88 



f Style one. Capsule 3 5-celled, OO-seeded. ERICACEAE. 73 



g Ovary deeply 4-parted, forming 4 achenia. BORRAGINACEJE. 90 



g Ovaries 2, distinct (often covered by the stamens), (h) 

 g Ovary 1, compound, 1-celled (placenta often large), (k). 

 S Ovary 1, compound, 2 6-celled. (m). 



h Stigmas connate. Flower bud convolute. ArocTNACE2E. 96 



h Stigmas connate. Flower bud valvate ? ASCLEPIADACE^E. 97 



h Stigmas distinct. Flowers minute, yellow, CONVOLVULACE^B. 93 



k Ovule solitary. Corolla limb entire. ORD. 101 



k Ovules several. Leaves cleft and lobed. HYDROPHYLLACE.E. 91 



k Ovules several. Lvs. or Ifts. entire. Fls. not spicate. GENTIANACE^B. 95 



Fls. spioate. PLANTAGINACE,E. 79 



m Leaves all radical. Flowers spiked. . PLANTAGIXACEJB. 79 



m Leaves opposite. Ovary 2-celled. LOGANIACEJB. 85 



Ov. 3-celled. Not twining, i 



m Leaves alternate.-Ov. 3-celled. Not twining, f POLYMONIACM. 95 



Ov. 2-celled. Twining. CONVOLVULACE^E. 93 



Ov. 2-celled, 4-seeded. Erect. BORRAGINACEJS. 90 



Ov. 2-celled, cc -seed. Styles 2. HYDROPHYL. 91 



Style 1. SOLANACE.B. 94 



n Shrubs. Corolla 5-parted, imbricated in bud. JASXINACEJS. 98 



11 Shrubs. Corolla 4-parted, valvate, or none. OLEACE^E. 99 



o Ovary deeply 4-parted, forming 4 (or fewer) achenia. (p) 

 o Ov. entire, 4-ovuled, 4 or fewer-seeded. Lvs. opposite. VERBENACE^E. 88 

 o Ovary entire, OO-ovu'ed, CO or several-seeded, (s) 



p Leaves opposite. Stems square. Stamens 24. LABIATE. 89 



p Leaves alternate. Stems round. Stamens 5. BORRAGINACE^E. 90 



s Trees or climbing shrubs. Seeds winged. BIGNONIACEJE. 83 



s Trees. Seeds not winged. SCBOPH. 86. Erect shrubs. ERICACEAE. 73 



s Herbs. Leafless parasites. OROBANCHACEJE. 82 



Lvs. at base. Fruit 1-celled. Fls. spurred. LENTIBULACE^E. 81 



Leafy. Fruit 4 5-celled. Leaves opposite. PEDALIACEJS. 84 



Fruit 2-celled. (t) 



t Corolla convolute in bud. Seeds exalbuminous. ACANTHACE^E. 87 

 t Corolla imbricate in bud. Seeds albuminous. SCBOPHULARIACE js. 86 

 t Corolla plicate in bud. Seeds albuminous. SOLANACEJS;. 94 



C COHORT 3. APETALOUS. 



t Plants herbaceous, the flowers not in aments (except Humulus, 115). (2) 

 Tf Plants woody, shrubs or trees. (5) 



2 Flowers with a regular calyx (or a calyx-like involucre). (3) 

 2 Flowers achlamydeous, neither calyx nor corolla, (f) 



3 Calyx tube adherent to the ovary, limb lobed, toothed, or entire, (a} 

 3 Calyx free from the ovary, sometimes enclosing it. (4) 



