ANACARDIACEAE (SUMAC FAMILY) 147 



A. Sepals 4-5; petals 4-5; stamens 10; stigmas 4-5. (Gk. limme = a lake; 



anthos = a flower; from the common lake-shore habitat.) (F. & R. p. 247.) 



Limnanthes 

 AA. Sepals 2-3; petals 2-3; stamens 6; stigmas 1-3. (Honor of G. H. Floerke, 



a German botanist.) Floerkea proserpinacoides (FALSE MERMAID) 



ANACARDIACEAE (SUMAC FAMILY) 



Shrubs; juice resinous or milky. Leaves alternate, 3-foliolate 

 or odd-pinnate. Flowers mainly regular, perfect or polygamo- 

 dioecious. Calyx 3-y-cleft or -parted. Petals as many as the 

 sepals, or rarely none. Stamens 5. Ovary in the stamina te 

 flowers i -celled; ovary in the pistillate flowers i -celled; styles 3; 

 cells i-ovuled. Fruit a small drupe. Only the following genus. 



RHUS (SUMAC) 



Stipules none. Flowers in axillary or terminal clusters. (Celtic rhudd 

 = red ; hence Gk. rhus = these plants, on account of the red fruit.) 



A. Leaflets 11-31; fruit red, pubescent. E. R. glabra (SMOOTH SUMAC) 



AA. Leaflets 3; fruit white or red, glabrous. 

 B. Plant with unpleasant odor; flowers in spikes or heads; fruit red. W. C. E. 



R. trilobata (SKUNK BUSH) 

 BB. Plant without unpleasant odor; flowers in panicles; fruit white, smooth or 



striate. 



C. Leaflets mostly subentire, the lateral ones petioled. E. Poisonous to touch. 



R. toxicodendron (POISON IVY) 



CC. Leaflets mostly crenate, the lateral ones sessile. W. Poisonous to touch. 



R. diversiloba (POISON OAK) 



CELASTRACEAE (STAFF-TREE FAMILY) 



Shrubs. Leaves simple; stipules none or small. Flowers 

 regular, small. Calyx 4~5-lobed or -parted, persistent. Petals 

 4-5. Stamens alternate with the petals. Ovary free or united 

 with the disk, i-5-celled; styles short, thick; stigma entire or 2-5- 

 lobed; cells 2-4-ovuled. Fruit a capsule or follicle. 



A. Leaves opposite, ovate to lanceolate, serrulate; branches not spiny; stamens 

 4 or 5. 



B. Shrub i m. or less high; leaves evergreen, 1.2-2.5 cm. long; flower parts in 4's; 

 ovary 2-celled. W. C. E. (Gk. pachis = thick; + stigma.) 



Pachistima myrsinites 



BB. Shrub 2-5 m. high; leaves deciduous, 5-10 cm. long; flower parts in s's; 



ovary 3~5-celled. W. C. (Gk. eu = good, onoma = name; applied in irony, 



since it was thought to poison cattle.) Euonymus occidentals (WESTERN WAHOO) 



AA. Leaves alternate, deciduous, oblaneolate, entire; branches spiny; stamens 10; 



flower parts in s's. E. (Meaning undetermined.) Forsellesia spinescens 



