Flora of the Palousc Region 



Stipules (ocreae) sheathing the stern at the nodes. 



POLVGONACEAE 59 



Stipules not sheathing the stem, or none. 



Herbs, aquatic. callitrichaceae 112 



Herbs not aquatic. 



Ovary 3-celled: juice milky. euphorbiaceae ho 



Ovary i-celled: juice not milky. 



Flowers with scarious bracts. amaranTACEae 66 



Flowers without scarious bracts. 



CHENOPODIACEAE 64 



Shrubs or trees. 



Cells of ovary each 2-ovuled. sapindaceae 113 



Cells of ovary each i-ovuled. 



Ovary 3-celled. rhamsaceae 114 



Ovarv 2-celled. urticaceae 5 6 



B— PETALS PRESENT. 



1— STAMENS MORE THAN Id AND MORE THAN TWICE THE SEPALS. 



Calyx free and separate from the pistil. 



Pistils numerous, separate, concealed in a hollow receptacle. 



ROSACEAE 93 



Pistils more than 1, separate, not enclosed in the receptacle. 



Stamens on the calyx, distinct. rosaceae 93 



Stamens united with the base of the petals, monadelphous. 



MALVACEAE 115 



Stamens on the receptacle, free. ranunculaceae 74 



Pistils several, their ovaries cohering in a ring around an axis. 



"" MALVACEAE H5 



Pistil 1 as to the ovary, the styles or stigmas i-several. 

 Leaves minutely punctate with pellucid dots. 



hvpericaceae 116 



Leaves not punctate with pellucid dots. 



Ovary simple, i-celled, 2-ovuled. rosaceae 93 



Ovary simple, i-celled, with 1 parietal many-ovuled placenta. 



RANUNCULACEAE 74 



Ovary compound, i-celled, with a central placenta. 



PORTULACACEAE 67 



Ovary compound, several-celled. 



Aquatic or marsh herbs: leaves peltate. 



NVMPHAEACEAE 74 



Terrestrial herbs or shrubs: leaves not peltate. 



MALVACEAE 115 



Calyx more or less coherent with the surface of the compound ovary. 



Ovary 10-celled; cells i-ovuled. rosaceae 93 



Ovary 2-5-celle"d. 



Leaves alternate, with stipules. rosaceae 93 



Leaves opposite, without stipules. saxifragaceak 88 



Ovary i-celled, with parietal placenta. 



Fleshy plants, leafless or with minute leaves: petals many. 



CACTACEAE 119 



Rough-leaved plants: petals 5-10. LOAsaceak 118 



Ovary i-celled, with basal placenta. porTulacaceak 67 



