XIV 



ANALYTICAL ARTIFICIAL KEY. 



* * With ordinary green herbage. 



4- Corolla regular or nearly so : stamens not didynamous. 

 Corolla scarious and veinless : stemless herbs. 

 Corolla more or less veiny. 



Stamens 2 or 3, but parts 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. 



Ovaries 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 opposite 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 GENTIAKACEJE, 62. 

 Leaves various, mainly alternate. 

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

 sule 1 - 2-celled. HYDROPHYLLACE*:, 64. 

 Style only 1 : stigma usually 1 : capsule or berry 



2-celled, or rarely more, many-seeded. SOLANACEJE, 67. 



See also Verbascum & Limosella in SCKOPHULARIACE^E, 68. 



4- 4- 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. SCROPHULARIACEJE, 68. 

 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 splitting into 2 or 4 one-seeded nutlets (or 



PLANTAGINACE.E, 75. 

 OLEACE.E, 59. 

 ASCLEPIADACEJE, 61. 



APOCYNACE^;, 60. 

 BOURAGINACE^E, 65. 



POLEMONIACE.E, 63. 

 CONVOLVULACE.E, 66. 

 GENTIANACKE, 62. 



BIGNONIACE.&, 71. 

 ACANTHACE.S;, 72. 

 LENTIBULARIEJB, 70. 

 LABIATJE, 73. 



berry-like with as many stones). 



VERBENACE.S, 74. 



APETALOUS FORMS IN POLYPETALOUS AND GAMOPETALOUS ORDERS. 



Carpels several or numerous and distinct : stamens hypogynous. 

 Carpels single and simple : calyx also wanting. Achlys in 



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

 Carpel single and simple : stamen epigynous. Hippuris in 



Carpels combined into a compound ovary, which is 

 One-celled and 1 -2-ovuled. 

 Herbs with scarions stipules. 



Shrubs without stipules. Pistacia in 



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



Aquatic herbs. Myriophyllum in 



Terrestrial herbs, 2-seeded. Lepidium in 



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. Fraxinus in 



A pair of samaras. Acer & Negundo in 



One-celled and many-ovuled : herbs. 

 Placentas 3, parietal : ovary inferior. 

 Placentae 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. 



RANUNCULACE.E, 1. 

 BEUBEUIDACE.E, 2. 

 ROSACES, 32. 

 HALOUAGE^E, 38. 



ILLECEBRACE.E, 15. 

 ANACARDIACE^E, 30. 



HALORAGE^E, 38. 

 CRUCIFER^E, 7. 



RHAMNACEJE, 27. 



OLEACE^E, 59. 

 SAPINDACEJS, 29. 



DATISCACE^E, 42. 

 SAXIFRAGACE^:, 34. 



Glaux in PRIMULACE^B, 57. 



CARYOPHYLLACE.E, 14. 



Ludwigia in 

 Allotropa in 



FICOIDE.S:, 44. 

 ONAGRACE^E, 39. 

 ERICACEAE, 54. 

 STERCULIACE.E, 21. 



