ILLINOIS NATURAL HISTORY SURVEY MANUAL 1 



KEY TO FAMILIES — CONT'd 



34. Sepals 2 PURSLANE FAMILY p. 89 



Sepals 4 or 5 ORPINE FAMILY in part p. 138 



35. Plants growing in water WATER LILY FAMILY p. 91 



Plants growing on land 36 



26. Stamens more than 12 37 



Stamens not more than 12 41 



37. Sap milky or highly colored POPPY FAMILY p. 119 



Not thus 38 



38. Stamens united into a column around the pistil 



MALLOW FAMILY p. 193 



Not thus 39 



39. Pistils more than 1 CROWFOOT FAMILY in part p. 95 



Pistil 1 40 



40. Petals 5 ST. JOHN'S-WORT FAMILY p. 199 



Petals more than 5 BARBERRY FAMILY in part p. 115 



41. Flowers imperfect SPURGE FAMILY in part p. 181 



Flowers perfect 42 



42. Corolla regular 43 



Corolla irregular 47 



43. Petals 3 FALSE MERMAID FAMILY p. 183 



Petals 4 44 



Petals 5 45 



Petals more than 5 BARBERRY FAMILY in part p. 115 



44. Stamens 6, 2 shorter than other 4 . . .MUSTARD FAMILY p. 1 24 

 Stamens more than 6 CAPER FAMILY p. 136 



45. Ovary 5-lobed GERANIUM FAMILY p. 177 



Not thus 46 



46. Leaves opposite; nodes swollen PINK FAMILY p. 82 



Leaves alternate or basal WOOD SORREL FAMILY p .175 



47. Leaves with stipules or stipular lines 48 



Not thus 49 



48. Leaves simple VIOLET FAMILY p. 200 



Leaves compound PULSE FAMILY in part p. 157 



49. Calyx spurred; flowers large 



^ TOUCH-ME-NOT FAMILY p. 191 



Calvx not spurred; flowers small 



MILKWORT FAMILY p. 180 



50. Style 1 >' I 



Styles 2 52 



51. Calyx tube enclosing ovarv and wholly free from it 



. LOOSESTRIFE FAMILY p. 205 



Calvx tube attached to whole length of ovarv 



EVENING PRIMROSE FAMILY p. 208 



52. Flowers small in umbels PARSLEY FAMILY p. 214 



Flowers various, not in umbels 



SAXIFRAGE FAMILY in part p .139 



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