NYSSA L. 

 NYSSACEAE 



Sour-gum Family 



ogeche Marsh. 



sylvatica Marsh. 



sylvatica Marsh, var. biflora (Walt.) Sarg. 



OCHNA L. 

 OCHNACEAE 



atropurpurea DC. 



OLEA L. 

 OLEACEAE 



europaea L. 



ORIGANUM L. 

 LAMIACEAE 



onites L. 



ORIXA Thunb. 

 RUTACEAE 



japonica Thunb. 



OSMANTHUS Lour. 

 OLEACEAE 



Ochna Family 



Olive Family 



Mint Family 



Citrus Family 



Olive Family 



americanus (L.) A.Gr. 

 armatus Diels 

 xfortunei Carr. 

 xfortunei Carr. 'San Jose' 

 fragrans Lour. 

 fragrans Lour. 'Aurantiacus' 

 heterophyllus (G.Don) P.S.Green 



var. heterophyllus 

 heterophyllus (G.Don) P.S.Green 



var. heterophyllus 'Gulf Tide' 

 heterophyllus (G.Don) P.S.Green 



var. heterophyllus 'Purpureus' 

 heterophyllus (G.Don) P.S.Green 



var. heterophyllus 'Rotundifolius' 

 heterophyllus (G.Don) P.S.Green 



var. heterophyllus 'Variegatus' 



OSTEOMELES Lindl. 

 ROSACEAE 



schwerinae Sehneid. 



OSTRYA Scop. 

 BETULACEAE 



virginiana (Mill.) K.Koch 



Rose Family 



Birch Family 



OXYDENDRUM DC. 

 ERICACEAE 



arboreum (L.) DC. 



PACHYSANDRA Michx. 

 BUXACEAE 



Heath Family 



Boxwood Family 



axillaris Franch. 

 procumbens Michx. 

 terminalis Sieb. & Zucc. 

 terminalis Sieb. & Zucc. 'Silveredge' 



PAEONIA L. 

 PAEONIACEAE 



suffruticosa Andr. 



PALAFOXIA Lag. 

 ASTERACEAE 



feayi A.Gr. 



Peony 

 Peony Family 



Aster Family 



PARKINSONIA L. 



FABACEAE (Caesalpinioideae) Bean Family 



aculeata L. 



PARROTIA C.A.Mey. 

 HAMAMELIDACEAE Witch-hazel Family 



persica (DC.) C.A.Mey. 



PARROTIOPSIS (Niedenzu) Sehneid. 

 HAMAMELIDACEAE Witch-hazel Family 



jacquemontiana (Decne.) Rehd. 



PARTHENOCISSUS Planch. 

 VITACEAE Grape Family 



henryana (Hemsl.) Diels & Gilg 

 quinquefolia (L.) Planch. 

 tricuspidata (Sieb. & Zucc.) Planch. 



PASSIFLORA L. 



PASSIFLORACEAE Passion-flower Family 



coccinea Aubl. 



PAULOWNIA Sieb. & Zucc. 

 SCROPHULARIACEAE Figwort Family 



kawakamii Ito 



tomentosa (Thunb. ex J.A.Murr.) Steud. 



289 



