308 ri.ANT XAMKS AND SYNONYMS 



1(>71. PSELDOCYMOPTERUS, Coult. & Rose. Lmbelliferae. 



From (jr reek, "fakeCvmopterus", Herbs, Three species, of 

 western U. S. 



1672. PSEUDOMAOENNETUS, Rusch. Asclepiadaceae. 



Shrubby climber, perhaps referable to some other genus. 



(a) P. Equatorieiisis, Kusch, Peru to Ecquador. Cundu- 

 rango bianco, Mata perro, Bark alterative. 



1673. PSEUDOPHOENIX, Wendl. Sabalaceae. 



From Greek, * 'false Date". A small palm with pinnate 

 leaves. One species, West Indies to Florida. 



1674. PSEtDOTSl^GA,Carr. False Hemlock- Spruce. Piiiaceae. 

 From Greek, "false Tsuga". Syn. Pinus, in part. Trees 



resembling Hemlock Spruce. Two species, both of western 

 U. S. 



a. P. taxifolia (Lamb.) Brit. (Pin. taxifolia Lamb., Ps. Douglasii 

 Car. (Kew), B. mucronata (Raf, ) Sudw. ). Puget Sound to 

 California. Douglas Spruce, Douglas Fir, Yellow or Red 

 Fir, Oregon Pinef. Timber valnahle, especially for ship's masts. 



(b) P. macrocarpa (Torr. ) Lemmon, Big-cone Spruce, is the 

 Hemlock tree of southern California. 



1676. PSIDIUM, L. Guava. Myrtaceae. 



From Greek, * 'pulpy", the name originally of the pomegran- 

 ate. Syn. Guaiava, Adans. Trees or shrubs. About 100 spe- 

 cies, tropical America; 2 nat. in U. S. 



a. P. Cattleiaiiuiii Sabine. Brazil, cult, in all tropical countries. 



Purple Guava, Strawberry Guava. Fruit esculent, agreeably 

 acid. 



b. P. (xuajava L. (G. pyriformisGaertn., including P. pomiferum 



L. and P. pyriferum L. ). Tropical America, widely cult, and 

 nat. in tropical countries. Guava, Common Guava, Bay Plum; 

 Sp. Guayaba. FrwiY esculent, yielding a delicious jelly. Other 

 species also produce esculent fruits. 



1676. PSILACTIS, Gray. Psilactis. Compositae. 



From Greek, "naked ray", the ray florets having no pappus. 

 Annual herbs. Two species, Texas to California. 



1677. PSILOCARPHUS, Nutt. Psilocarphus. Compositae. 



From Greek, "bare chaff". Syn. Benzanilla, Micropus, in 

 part. Woolly annuals. About 8 species, all American; 5 in 

 U. S. (Pacific border). 



1678. PSIL<3STR0PHE, DC. 1838. Psilostrophe. Compositae. 



Syn. Riddellia, Nutt. 1841. Perennial herbs with rather 

 small flower-heads (yellow). Three species, southwestern U. S. 

 and Mexico. 



1679. PSORALEA. L. Psoralea. Papilionaceae. 



From Greek, "scurfy". Syn. Hedysarum, in part. Herbs 

 or shrubs with flowers in racemes, spikes or heads. About 110 

 species; 37 in U. S. 



