ANALYTICAL ARTIFICIAL KEY. 



* * With ordinaiy green 

 Corolla regular or nearly so : stamens not didynamous. 



Plantaginace^, /5. 



Corolla scarious and veinless : stemless herbs. 

 Corolla more or less veiny. 



Stamens 2 or 3, but i)arts of corolla 4 or 5. 

 Stamens 5, sometimes 4, as many as the corolla-lobes. 

 Pollen in solid waxy masses : fruit a pair of follicles. 

 Pollen in powdery grains. 



0^■aries 2 : fruit a pair of follicles. 



Ovary 4-lobed, forming 4 separate or separable seed-like nutlets. 



Ovary single and entire. 



Style 3-cleft at apex : capsule 3-celled : corolla convolute. 

 Styles or stigmas 2 or 1. 



Ovules and seeds at most 4, large, with large embryo and 



little or no albumen : peduncles axillary. 

 Ovules few or numerous : embryo small, in albumen. 

 Leaves all ojiposite or whorled and entire : capsule 



1-celled : corolla convolute in the bud. 

 Leaves alternate, 3-foliolate : leaflets entire : corolla in- 

 duplicate : flowers racemose. Menyanthes in Gentianace.e, 62. 

 Leaves various, mainly alternate. 



Styles 2, or 1 and 2-cleft (except in Romanzoffia) : cap- 

 sule 1 - 2-celled. HYcr.opHYLLACE^, 

 Style only 1 : stigma usually 1 : capsule or berry 



2-celled, or rarely more, many-seeded. Solanace^, 67. 



See also Vcrbascum & Limosella in SciiornuLAniACE^^ 



-t- +- Corolla irregular : stamens (with anthers) only 4 and didynamous, or 2 : style 1 

 Ovary and capsule 2-celled, few - many-seeded. 



Seeds small, mostly indefinite : embryo small in copious albumen. 

 Seeds larger in proportion, filled by the flat embryo. 



Numerous in a long capsule, winged, on a partition which sepa- 

 rates from the valves. 

 Few, on hooked processes of the placenta. 

 Ovary and capsule 1-celled, with many-seeded placenta; in the axis. 

 Ovary 4-parted, in fruit as many seed-like nutlets. 

 Ovary undivided : fruit s])litting into 2 or 4 one-seeded nutlets (oi 

 berry-like with as many stones). 



Oleace^, 59. 

 asclepiadace^, 61. 



Apocynace^, 60. 



BoURAGINACEiE, 65. 



POLEMONIACE^, 63. 



CoNVOLVULACEiE, 



Gentianace^, 62 



SCKOPHULAllIACE^, 68. 



BiGKONIACEii:, 71. 

 ACANTHACEJE, 72. 

 LENTIBULARIEiE, 70. 



Labiate, 73. 



VEUBEXACEiE, 74. 



Apetalous Fop.ms in Polypetalous and Gamopetalous Orders. 

 Carpels several or numerous and distinct : stamens hypogynous. RANUNCULACEiE, 1. 



Carpels single and simple : calyx also wanting. Achlys in Berberidace^, 2. 



Carpels 1 or 2, rarely 3, distinct and free : stamens on the calyx. Rosace^e, 32. 



Carpel single and simple : stamen epigynous. _ _ Hippuris m Halorage^e, 38. 



Carpels combined into a compound ovary, which is 

 One-celled and 1 - 2-ovuled. 



Herbs with scarious stipules. ^. . . iLLECEBRACEiE, 15 



Shrubs without stipules. Pistacia m Anacardiace/e, 30. 



Two - four-celled, with one or at most two ovules in each cell. 



Aquatic herbs. 



TeiTestrial herbs, 2-seeded. 



Myriophyllum in HALORAGEiE, 38. 

 Lepidium in CruciferjE, 7. 



Shrubs or trees. 



With alternate simple leaves and fleshy fruit. 

 With opposite compound or lobed leaves, and 

 Single 1-celled 1 -seeded samara for fruit 

 A pair of samaras. 

 One-celled and many-ovuled : herbs. 

 Placenta; 3, parietal : ovary inferior. 

 Placenta; 2, parietal : ovary partly superior. 

 Placenta 1, central or basal : leaves mostly opposite. 

 Style and stigma one. 



Styles or at least stigmas 3, or rarely more. 

 Two - five-celled and many-ovuled. 



Herbs, with free calyx and green herbage. 

 Herbs, with adnate calyx and green herbage. 

 Herbs destitute of green herbage. 

 Shrub, with alternate lobed leaves. 



RHAMNACEiE, 27. 



Fraxinus in Oleace^, 59. 

 Acer & Negundo in SAPiNDACEiE, 29. 



DATISCACEiE, 42. 



Saxifragace^, 34. 

 Glaux in Primulace^, 57. 



CARY'OPHYLLACEiE, 14. 



FicoiDE^, 44. 

 Ludwigia in Onagrace^, 39. 

 AUotropa in Ericace/e, 54. 



SXERCULIACEiE, 21. 



