KEY TO THE FAMILIES AND GENERA 



81 



Cohort J. POLTOALALES. Stamens as many or twice as many 

 as petals: carpels usually 2: ovary usually perfectly or imperfectly 

 2-celled, usually compressed. 



A. Fls. regular or slightly oblique. 

 B. Stamens 5, as many as sepals or 



petals: woody 23. PITTOSPO RACEME. 



BB. Stamens twice as many as sepals or 

 petals, which are usually 4 or 5, 



rarely 3: woody 24. TREMANDRACE. 



AA. Fls. irregular: herbaceous or woody. . . . 25. POLYQALACEJE. 



Cohort 4. CARYOPHYLLALES. Stamens definite, rarely co : 

 ovary 1-celled or imperfectly septate; placenta central, rarely 

 parietal: embryo curved, or coiled, rarely straight. 



A. Sepals of same number as petals: 



placenta 1, central: herbs 26. CARYOPHYLLACE.. 



AA. Sepals fewer than petals: placenta 1, 



central: herbs. 27. PORTULACACE. 



AAA. Sepals of same number as petals: 



placenta several: mostly woody. 

 B. Corolla polypetalous; stamens with- 

 out scale, glabrous; fls. spicate or 



racemose 28. TAMARICACE.E. 



BB. Corolla gamopetalous; stamens with 

 scale, hairy; fls. thy rsoid -panicu- 

 late 29. FOUQUIERIACE-E. 



Cohort 5. GUTTIFERALES. Stamens usually CD; sepals imbri- 

 cated: ovary septate; placentae on the inner angles of the cells, i.e., 

 axile. (See also, as exceptions with disk absent, the Linaeese, 

 Erythroxylaceae, Malpighiacese, Geraniacefe, Tropseolacese, Lim- 

 nanthacese, Oxalidacese, Balsaminacea*. Ochnacece, Rutacese, Ana- 

 cardiacese and Sapindacese, all belonging to the Discifiorse. (See 

 also Nigella of the Ranunculacece. ) 



A. Lvs. opposite or whorled, herbaceous: 



fls. cymose or panicled, bisexual 30. HYPERICACE.E. 



AA. Lvs. opposite or whorled, coriaceous: 



fls. cymose or panicled. 

 B. Receptacle not enlarged; fls. uni- 

 sexual 31. GUTTIFER-B. 



BB. Receptacle enlarged, barrel-shaped 

 between pistil and corolla, bearing 



the stamens; fls. bisexual 32. EUCKYPHIACE-G. 



AAA. Lvs. alternate, coriaceous: fls. mostly 



racemose. 



B. Cells of ovary 2-10: stamens numer- 

 ous 33. TERNSTROSMIACE*:. 



BB. Cells of ovary 1 : stamens 8 34. STACHYURACE.K. 



Cohort 6. MALVALES. Stamens usually c or monadelphous; 

 sepals valvate: ovary septate; placentae axile. 



A. Anthers 1-celled; pollen rough: herbs 



or woody 35. MALVACE*. 



AA. Anthers 1- to several-celled: pollen 



smooth: woody plants 36. BOMBACACE*. 



AAA. Anthers 2-celled: fls. with staminodia 

 and queer stamen-tube : woody 



plants 37. STERCUUACE*:. 



AAAA. Anthers 2-celled; stamens nearly free; 

 no staminodia: ovule often pendulous 

 with raphe toward axis. 



B. Petals ordinary: herbs or woody 38. TILIACE-E. 



BB. Petals firm, often hairy or incised: 



woody plants 39. ELJEOCARPACEJS. 



Anomalous Group. Stamens co ; sepals 

 valvate: carpel 1: ovary 1-celled: fls. reg- 

 ular: Ivs. compound: herbs or woody 



(Mimoesse, incl. in Leguminosffi.) 



Series 2. DISCIFLOR.E. Calyx usually inserted under the ovary; 

 petals in 1 series: stamens usually definite, inserted within or upon 

 or around the receptacle, which is usually expanded as a disk within 

 the calyx: ovary usually free, or imbedded in the disk. (See Fla- 

 courtiacese and Trapacese.) 



Cohort 1. GERANIALES. Disk usually a ring between stamens, 

 or adnate to staminal tube, or reduced to glands alternating with 

 the petals, rarely 0: ovary commonly lobed, rarely entire or sub- 

 apocarpous; ovules 1-2 in each cell, pendulous; raphe toward axis. 

 (See StackhousiacesB. ) 



A. Ovary more or less lobed or grooved. 

 B. Anthers elongated; disk enlarged in 



fr 51. OCHNACE.E. 



BB. Anthers normal. 



c. Calyx-lobes 5, all or mostly with 2 



glands outside: woody 42. MALPIQHIACE.E. 



cc. Calyx-lobes not biglandular. 



D. Foliage glandular-dotted: car- 

 pels sometimes separate 49. RUTACE*. 



DD. Foliage not glandular-dotted. 

 E. Lvs. usually opposite, com- 

 pound 43. ZYOOPHYLLACE.C. 



EE. Lvs. alternate. 



F. Disk well developed, irregu- 

 lar; petals often irregular; 

 ovary usually open above: 

 herbs, rarely shrubs. 

 (See No. 18, Resedacea:.) 



6 



TT, Disk well developed, regu- 

 lar: petals regular: ovary 



closed: woody plants 50. SIMARUBACEA. 



FFF. Disk indistinct, otherwise 



as in the last: herbaceous. 



a. Ovule solitary: stamens 



6-10. 



H. Fr. dehiscent: stamens 

 connate at base; fls. 

 regular or irregular. .44. GEHANIACE^E. 

 HH. Fr. mdehiscent: sta- 

 mens free; fls. irregu- 

 lar: ovule pendulous..45. TROP-EOLACE.*. 

 HHH. Fr. indehiscent: sta- 

 mens free: fls. regu- 

 lar: ovule ascending.. 46. LlMNANTHACEA. 

 ao. Ovules several: fr. dehis- 

 cent. 



H. Stamens 10: fls. regu- 

 lar 47. OXAUDACE*. 



HH. Stamens 5: fls. irregu- 

 lar 48. BALSAMINACCA. 



AA. Ovary entire. 



B. Stamens monadelphous, at least 



below : woody plants. 

 c. Stamen-tube stipitate; disk vari- 

 ous 53. MELIACE*. 



cc. Stamen-tube sessile ; disk 0. 



D. Petals not appendaged: fr. cap- 



sular 40. LINAGES. 



DD. Petals appendaged: fr. drupace- 

 ous 41. EBYTHROXYLACE.B 



BB. Stamens free. 



c. Ovules several or many. 



D. Mostly herbaceous plants. (See 



No. 17, Capparidaceae. ) 

 DD. Woody plants. (See No. 22, 



Flacourtiacese. ) 

 cc. Ovules 1-2 52. BURSERACE.E. 



Cohort 2. OLACALES. Disk cup-shaped or ring-shaped, free, or 

 bearing the stamens and petals on its edge: ovary 1-oo-celled, 

 entire ; ovule solitary, pendulous ; raphe away from axis. 



A. Petals or corolla-lobes usually valvate: 



woody 54. OLACACE^E. 



AA. Petals or corolla-lobes imbricate or 



convolute. 



B. Fr. drupaceous, slightly fleshy, 3-18- 

 stoned ; stones 1 -seeded : fls. not 



racemose: woody 55. AQUIFOLIACK.E. 



BB. Fr. crustaceous or spongy, 2-4- 

 celled, 1-4-seeded: fls. racemose: 

 woody 56. CYRILLACE.E. 



Cohort 3. CELABTRALES. Disk tumid or adnate to the calyx 

 or covering its base: stamens inserted around the disk or affixed to 

 its margin: ovary usually entire; ovules usually 2 in each cell, erect: 

 raphe turned toward axis: Ivs. simple or rarely compound. 



A. Calyx valvate; petals small, concave; 



stamens opposite the petals: woody.. ..59. RHAUNACE.E. 

 AA. Calyx imbricate. 



B Stamens alternate with the petals, 



the latter imbricate, 

 c. Petals spreading: calyx small: 



woody 57. CELASTHACE.E. 



cc. Petals erect, often connate: calyx- 

 tube hemispherical: herbs 58. STACKHOUSIACE.*: 



BB. Stamens opposite the petals, the lat- 

 ter valvate, dropping off early: 



woody, rarely herbaceous 60. VITACE^E. 



(Incl. LeeaceaO 



Cohort 4. SAPINDALES. Disk various; stamens variously 

 inserted on the disk: ovary entire, or more often lobed, or suba- 

 pocarpus; ovules commonly 1-2 in each cell, arcending, with raphe 

 toward axis, or reversed, or solitary and pendulous from an ascend- 

 ing funicle, rarely c and horizontal: Ivs. pinnate, rarely simple 

 (No. 62) , or (No. 65) digitate. 



A. Carpels 2 : f r. a samara 62. ACERACE.E. 



AA. Carpels 2-3 :fr. a drupe, 1-seeded 61. SABIACEAI. 



AAA. Carpels 3-5: fr. rarely samaroid in 



Sapindacese. 

 B. Bark containing resin: disk intra- 



staminal 67. ANACARDIACE.E. 



BB. Bark not resinous, or, if so, disk 



extrastaminal. 



c. Endosperm abundant; embryo 

 straight. 



D. Disk intrastaminal ; carpels 3 63. STAPH YLEACEA. 



DD. Disk extrastaminal; carpels 4-5.. 64. MELIANTHACEJE. 

 cc. Endosperm sparse or wanting; 

 embryo curved : disk extra- 

 staminal. (See Sapindacese, 

 No. 66.) 



D. Lvs. opposite, palmately com- 

 pound 65. HIPPOCASTA- 



DD. Lvs. alternate, variously com- [NACE.E 



pound, or simple 66. SAPINDACEJB. 



