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 



^Ot^ovq^ a town in Locris. 

 Orientalis-e. Pertaining to the Orient or East. 

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



opof, mountain, 4" yai'of, brightness, joy. 

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



Gr. bpo^^ 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. o^ic, sour. 

 Oxycedrus. Prickly cedar. Ancient Greek name ; from b^vq^ sharp, + 



KedpoQ^ cedar. Cedar with pointed leaves. 

 Paeonia. Peony. The ancient Greek name. From HaMv, physician to the 



gods. 

 Palmatus-a-um. Pertaining to a palm, like a palm. From Lat. palnm,3. palm. 

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

 Panax. Ginseng. Greek name of a plant. From ttoc, all, -f amr, 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, + faro, to bear. 

 Parviflorus-a-um. Having small flowers. Lat. parvus, small, ■■-{■ Uos, a 



flower. 

 Passiflora. Passion flower. Adaptation of the Latin Uos 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, -|- 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, -f- folium, 



leaf. 

 Penthorum. Ditch stonecrop. From Gr. irivre, five, + bpog^ 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. 



