INDEX—OCCURRENCE 211 
Wilkes Expedition 
— P. chrysocladon 
— Р. erassifoliua 
1316. P. longispieum 
1567. P. densum 
1667, 1772. P. villosum 
Wilkinson 
7 (1885). P. Wilkinsoni 
Williams 
178. P. Brittonianum 
255. P. piperoides 
428, 594. P. crassifolium : 
581. P. bolivianum 
Wilson (see Britton) 
1748. P. antillarum 
7250, 7254, 7315, 7814, 7851, 7854. 
P. trinervium 
7449, 7457, 7532, 7579. P. rubrum 
Wislizenus 
41. P. Cockerellii 
Wooton 
(1899, 1903), 127. P. Coryae 
(1900, 1909), 386, 2866. P. juni- 
perinum 
(1902, 1906). P. Cockerellii 
— & Standley 
(1906). P. Coryae 
Wright 
(1853-6). P. commutatum 
(1853-6). P. longispicum 
15, P. Cockerellii 
216 pp., 217, 1251a. P. piperoides 
216 pp., 437, 1251. P. dichotomum 
438, 1252 pp. P. racemosum 
452, 1302. P. antillarum 
512, 1200b, 1300b. P. rubrum 
630, 1787. P. eapitellatum 
632. P. Havardianum 
1252 pp. P. hexastichum 
1786, P. Coryae 
1788. P. juniperinum 
2650. P. Gundlachii 
—, Parry & Brummel 
458. P. anceps 
459. P. cerinocarpum 
460. P. hexastichum 
464. P. dichotomum 
465. P. piperoides 
467. P. antillarum 
Wuertemberg—see Paul 
Wullschlaegel 
— P. ceibanum 
256-7 P. trinervium 
991. P. piperoides 
1481. Р. racemosum 
В. OCCURRENCE 
NortH AMERICA 
United States 
Alabama e 
P. flavescens 
Arizona 
P. ealifornieum 
— distans 
— nanum 
P. Coryae 
P. densum 
P. juniperinum 
— nanum 
P. maerophyllum 
— circulare 
— Jonesii 
P. pauciflorum 
Arkansas 
Р. flavescens 
— orbiculare 
California 
P. ealifornieum 
— distans 
P. eoloradense 
P. densum 
— Parishii 
P. Liboeedri 
P. ligatum 
P. longispieum 
— eyclophyllum 
P. paueiflorum 
P. villosum - 
— rotundifolium 
