XXXIX 



121a. Flowers axillary; marsh or swamp plants 



HALORAGIDACEAE, p. 79. 

 121b. Flowers in terminal clusters 122. 

 122a. Stamens 2 6; taste mustard-like 



52b, in CEUCIFERAE, p. 46. 



122b. Stamens 10 or more -RESEDACEAE, p. 48. 



123a. Leaflets entire LIMNANTHACEAE, p. 68. 



123b. Leaflets serrate 70a, in ROSACEAE, p. 57. 



124a. Flowers solitary 31a, in RANUNCULACEAE, p. 38. 



124b. Flowers in dense terminal umbels or heads 



UMBELLIFERAE, p. 80. 



124c. Flowers in terminal racemes 2a, in COMPOSITAE, p. 114. 

 124d. Flowers in axillary spikes or panicles 



9b, in URTICACEAE, p. 24. 



125a. Leaves merely dissected, not truly compound with distinct leaf- 

 lets 126. 



125b. Leaves truly compound, with distinct petiolate leaflets 127. 

 126a. Flowers in axillary clusters CHENOPODIACEAE, p. 28. 

 126b. Flowers in terminal clusters COMPOSITAE, p. 113. 



127a. Stamens 5; flowers in umbels 128. 

 127b. Stamens 6; flowers in small clusters 



3b, in BERBERIDACEAE, p. 40. 

 127c. Stamens many; flowers in racemes or panicles 



RANUNCULACEAE, p. 35. 



128a. Styles 5 ARALIACEAE, p. 80. 



128b. Styles 2 UMBELLIFERAE, p. 80. 



129a. Flowers in dense cottony heads; plants more or less white- 

 woolly 79, in COMPOSITAE, p. 120. 

 129b. Pistillate flowers in an ovoid spiny involucre, ripening into a 

 bur 3a, in COMPOSITAE, p. 114. 

 129c. Flowers minute, subtended by palmately cleft axillary bracts 



la, in EUPHORBIACEAE, p. 66. 

 129d. Plants without any of the preceding characters 130. 



130a. Plants with milky or colored juice 



10, in EUPHORBIACEAE, p. 67. 

 130b. Plants with tendrils, at least on the upper leaves 



4a, in LILIACEAE, p. 11. 

 130c. Plants of nettle-like character, with stinging hairs 



8b, in URTICACEAE, p. 24 



130d. Plants with sheathing stipules, surrounding the stem above 



the base of each leaf POLYGONACEAE, p. 25. 



130e. Plants with smooth, pale, juicy, almost translucent stems 



12a, in URTICACEAE, p. 24. 



130f. Plants without any of the preceding structures or habits 

 131. 



