454 A TEXT-BOOK OF BOTANY. 



Opulus. Ancient Latin name of a kind of maple. 



Opuntia. Prickly pear. Ancient Greek name of a plant, perhaps from 



'OTTOI^ a town in Locris. 



Orientalis-e. Pertaining to the Orient or East. 

 Origanum. Wild marjoram. The ancient Greek name. Probably from 



opof, mountain, -}- ydvo^ 1 brightness, joy. 

 Ornus. Wild mountain ash. The classical Latin word. Perhaps from 



Gr. 6pof } mountain. 

 Osmunda. Flowering fern. From Osmunder, Saxon name of the Celtic 



divinity, Thor. 



Ostrya. Hop hornbeam. Ironwood. The ancient classical name. 

 Oxalis. Wood sorrel. Ancient classical name; from Gr. bfv?, sour. 

 Oxycedrus. Prickly cedar. Ancient Greek name ; from 6f?V, sharp, -{- 



Ke6poe t cedar. Cedar with pointed leaves. 

 Pseonia. Peony. The ancient Greek name. From Haiuv, physician to the 



gods. 



Palmatus-a-um. Pertaining to a palm, like a palm. From Lat. palma,a palm. 

 Palustris-e. Fenny, marshy, swampy. From Lat. palus, a marsh. 

 Panax. Ginseng. Greek name of a plant. From Tro^ , all, + <ko?, a cure ; 



all-healing, panacea. 

 Paniculatus-a-um. Having panicles. From Lat. panicula, a tuft or 



panicle. 



Panicum. Panic grass. Ancient Latin name of Italian panic grass. 

 Papaver. Poppy. The classical Latin name. 



Papyrifer-a-um. Producing papyrus. Lat. papyrus, -f- fero, to bear. 

 Parviflorus-a-um. Having small flowers. Lat. parvus, small, -\- ftos, a 



flower. 

 Passiflora. Passion flower. Adaptation of the Latin ftos passionis, flower 



of passion. From a supposed resemblance of the parts of the flower 



to the implements of the crucifixion. 

 Pauciflorus-a-um. Having few flowers. Lat. paucus, few, -f- flos, a 



flower. 

 Paullinia. Guarana. Named for C. F. Paullini, a German botanist (1643- 



1712). 



Pedatus-a-um. Having pedates or lobes. Lat. pcdo, to supply with feet. 

 Peltatus-a-um. Peltate or shield-like. Lat. pelta, a shield. 

 Pennatifolius-a-um. Feathered, winged. Lat. pennatus, winged, -)- folium, 



leaf. 



Penthorum. Ditch stonecrop. From Gr. irevre, five, + opoc, a rule ; refer- 

 ring to the quinary order of the flower. 

 Pepo. Pumpkin. Melon. The ancient Latin word. 



Pereirse. Of Pereira. Named in honor of Jonathan Pereira, an Eng- 

 lish pharmacologist, who visited South America (1804-1853). 

 Perfoliatus-a-um. Perfoliate. Stem apparently passing through the leaves. 



Lat. per, through, + folium, leaf. 



