54 SPRING FLORA 



equalling the petals in number; monadelphous at base. 

 Pistil of 5 (or sometimes 2-3) distinct or united carpels, 

 each carpel containing 1-2 ovules. Fruit a capsule, 

 which is as many celled as there are styles ; each cell 

 being partially divided into 2. 



1. L.INUM. Flax. 



Herbs with tough fibers in the bark, and sessile leaves. 

 Sepals, petals and stamens 5-merous. Styles 2-5. Ovary 

 globose. 



1. L. Lewisii Pursh. (L. perenne of Coulter's Manual; not 

 L.) Blue Flax. Perennial. Stems several from the same root; 

 erect, smooth, 1-3 ft. high. Leaves alternately 8-13; linear to 

 narrowly-lanceolate, numerous; with a gland taking the place 

 of stipules. Inflorescence corymbose. Flowers large, sky- 

 blue. Styles 5. Capsule when ripe longer than the calyx. Dry 

 plains. May-July. 



ORDER SAPINDAL.ES. 



ANACARDIACE^l. Cashew Family. 



Shrubs or trees with a resinous or milky acrid juice. 

 Leaves alternate and without stipules. Inflorescence 

 paniculate. Flowers small and regular; usually dioe- 

 cious or polygamous. Sepals 5. Petals 5. Stamens as 

 many or twice as many as the petals. Styles (or stig- 

 mas) 3. Ovary 1-celled and 1-ovuled, ripening into a 

 dry drupe. 



1. RHUS. Sumac. 



Shrubs or trees, with alternate and exstipulate 3-foliate or 

 pinnate leaves. Inflorescence axillary or terminal. Flowers 

 small; polygamous; greenish or yellowish -green. Stamens 5. 

 Pistil 1; ovary 1-ovuled; styles 3, terminal. Fruit a smali 

 berry-like drupe. 



1. R. canadensis trilobata (Nutt.) Gray. (R. aromatica tri- 

 lobata Gray.) Squawbush; Skunkberry. (Known medicinally 

 as Sweet, Fragrant or Aromatic Sumac.) A glabrous, bushy 

 shrub 2-7 ft. high; strongly ill-scented. Leaves petioled; 3- 

 foliate. Leaflets sessile or nearly so; the terminal one wedge- 

 shaped, the lateral ones smaller and obovate; all more or less 

 lobed. Flowers appearing before the leaves; ' yellowish-green; 

 in panicled spikes, some of which are at the end of the branch, 

 others at the ends of short lateral twigs. Drupe dark-red; 

 flattened; viscid-coated; acid to taste. Stone smooth. Dry hills 

 and plains. April-May. 



