276 PLANT NAMES AND SYNONYJIS 



1605. PARNASSIA, L. Grass of Parnassus. Saxifragaceae. 



The ancient Greek name, plant of "Parnassus". Scapose 

 herbs with white or yellowish flowers. About 12 species, north 

 temperate and arctic zones; 8 in U. S. Synonyms are White 

 Buttercup, White Liverwort. 



1600. PARONYCHIA, Adans. Whitlowwort. Caryopliyllaceae. 



Greek plant name, "whitlow plant". Syn. Anychia, in part. 

 Tufted perennials. About 40 species; 15 in U. S. Synonyms 

 are Nailwort and Knot-grass*. 



a. P. argyrocoma (Michx. ) Nutt. (A. argyrocoma Michx. ). 

 Maine to Georgia. Silver Whitlowwort, Silver Chickweed^ 

 Silver-head. 



1607. PAROSELA, Cav. 1802. Parosela. Papilionaceae. 



Anagram of Psoralea. Syn. Dalea, Willd. 1808, not P. Br., 

 1756. Herbs or shrubs with small purple, white or yellow 

 flowers in spikes. About 110 species, New World; 46 in U. S. 



1608. PARRASIA, Greene. Parrasia. Criiciferae. 



Syn. Greggia, Gray 1852, not Engelm. 1848. Sub-shrubs. 

 Two species, southwestern U. S. 



1609. PARRYA, R. Br. Parrya. Cruciferae. 



Low alpine herbs from thick perennial rootstocks. About 

 15 species, northern hemisphere; 4 in U. S. 



1610. PARRYELLA, Tor. & Gr. Parryella. Papilionaceae. 



One species in U. S. 



1511. PARS6nS1A,P. Br. 1756, (notof R.Br. 1809). Lythraceae. 

 Named for Dr. James Parsons, Scotch botanist. Syn., Cuphea, 

 P. Br. 1756, also Ly thrum, in part. Herbs or shrubs. About 

 180 species. New World; 5 in U. S. 



a. P. petiolata (L. ) Rusby (L. petiolatum L., C. viscosissima 

 Jacq. ). Rhode Island to Georgia, west to Kansas. Blue 

 Wax-weed, Clammy Cuphea, Tar-weed, Wax-bush, Wax-weed. 



1612. PARTHENICE, Gray. Parthenice. Compositae. 



Cinereous annual. One species, Colorado and Arizona. 



1613. PARTHENIUM, L. Feverfew, etc. Compositae. 



Greek plant name, "maidenly" or "pure". Syn. Hystero- 

 phorus, Adans. Perennial herbs or shrubs. About 10 species, 

 New World. 



a. P, Hysteropliorus L. (P. pinnatifidum Stokes). West Indies 



to southeastern U. S. Bastard Feverfew, Indian Mugwort, 

 Wild Wormwood, W^hite-head (W. Indies), Brown-bush. 

 Plant tonic, febrifuge, emmenagogue. 



b. P. integrifolium L. (P. amplectens Raf. ). Maryland to 



Georgia, west to Texas and Minnesota. American Feverfew, 

 Prairie Dock*, Cutting Almond, Nephritic plant, Wild Quinine. 

 Plant bitter, diuretic, febrifuge. 



