Key to the Orders. 13 



PAGE 



00. Calyx caducous ; juice milky or colored Papaveracea^. 50 



.')(). Calyx persistent; of :'. or five sepals, juice not as above Cistacece. 82 



.')1. Calyx persistent; stam. monadelphous, anthers \-cft\\in\. . .Malvacecp. 81 



■'>1. Calyx persistent ; stamens distinct ; aquatic plants .Xvmplia-acea'. 41 



•")!. Calyx deciduous ; stamens distinct ; trees Tiliacea. 80 



hi. Ovary 10 to.SO-celled; ovules many; aquatic plants \'ynipha-acccr. W 



52. Ovary 2 to 5-celled ; leaves alternate, with stipules Rosacea-. fiO 



52. Ovary 1-celled, with the ovules arising from the base Por/iilacaceer. :!.S 



5;>. Ovary 1-celled, anthers opening by uplifted valves Berheridaceo' 48 



.")3. Ovary 1-celled ; anthers not opening as above 54). 



5;!. Ovary 2 to 4-celled 55 . 



54. Style and stigma one Primuhxcece. 95 



54. Style 1, stigmas 3, sepals 2 PoilulacacecP. o8 



55. Calyx-lobes minute or obsolete, petals valvate Vilarr/r. 79 



55. Calyx 4 to .5-cleft, valvate in the bud, petals involute Rlnniiiia<rir. IW 



•'i(i. Calyx free from the ovary, the latter wholly superior 57 . 



■■)(■). Calyx-tube adherent to the ovary or its lower half 90 

 57. Ovaries 2 or more, separate -58 . 

 57. Ovaries 2-5, separate above, united at base ;()2'. 



.57. Ovaries or the lobes o-5, with a common style Geianiacece. 72 



.57. Ovary oiily one (15 . 



•58. Stamens on the receptacle, free from the calyx .59 



58. Stamens inserted on the calyx (01). 



59. Leaves punctate with pellucid dots • Rutacecr. T.\ 



■59. Leaves not punctate with pellucid dots 00 . 



00. Tree /with pinnate k.-ayes. ■»■.■/) SimarnpacetT.^ 7.\. 



01. Leaves with stipules ^ Rosacea-. 00 



01. Leaves without stipules Saxifragacea-. 57 



02. Leaves punctate with pellucid dots. Rtitacetr. 7:! 



02. Leaves not pellucid-punctate (03). 

 03. Shrubs or trees with opposite leaves (04). 



03. Terrestrial herbs ; carpels fewer than the petals Saxifragacetr. -57 



04. Leaves palmately compound, flowers irregular H i ppocastanacea . 78 



64. Leaves simple or pinnate ; fruit winged Aceracece. 77 



64. Leaves trifoliate; fruit an inflated, S-celled pod Staphyleaceo'. Ti 



65. Ovary simple ; placenta one, parietal Legiiminosa-. 08 



05. Ovary compound, as shown by cells, placentas, styles or stigmas 60. 



06. Ovary 1-celled 67). 



66. Ovary 2-several-celled 73). 



67. Corolla irregular, petals 4, stamens 6 Papaveraceo'. -50 



07. Corolla irregular petals and stamens 5 Violacea-. 82 



07. Corolla regular or nearly so 08 . 



08. Ovules solitary ; stigmas 3, shrubs or trees Anacardiacea. 75 



05. Ovules solitary or few ; herbs Crucifercs. 51 



08. Ovules more than one, in the center or bottom of the cell 09). 



08. Ovules several, on two or more parietal placentas 70 . 



09. Petals not inserted on the caly.x CaryophyUacecr. 38 



09. Petals on the throat of the calv.x Lytliracea-. 85 



