520 
PA SSI FLORA 
ornamental plants. Several have edible fruit, e.g. P. quadrangularis 
L., the Granadilla (trop. Am.), P. maliformis L., the sweet calabash 
(W. Ind.), P. laurifolia L., the water-lemon, & c. 
Passifloraceae. Dicotyledons (Archichl. Parietales). 18 gen. with 280 
sp. trop. and warm temp. Shrubs and herbs, mostly climbers with 
axillary tendrils, and with alt. stip. leaves. Firs. £ or unisexual, 
regular. Receptacle of various shapes, often hollowed and frequently 
with a central andro- or gyno-phore; it is usually terminated by out- 
growths, often of petaloid or staminodial appearance, forming the 
corona. K 3 — 5; C 3 — 5 or o; A 3 — 5; G (3), i-loc. with parietal 
placentae and several or 00 anatropous ovules; style 1, simple or 
branched, or 3 — 5 separate styles. Capsule or berry. Seed with fleshy 
aril and endosperm. Chief genera: Modecca, Passiflora. Benth.- 
Hooker include Caricaceae and Malesherbiaceae in P. and place the 
order in Passiflorales ; Warming excludes Caricaceae and places P. in 
Passiflorinae. [Cf. Acharia.] 
Passiflorales (Benth. -Hooker). The 13th cohort of Polypetalae (p. 
135 )- 
Passiflorinae (Warming). The 21st cohort of Choripetalae (p. 138). 
Pastinaca Linn. = Peucedanum Tourn. P. sativa L. = Peuced. sativum. 
Patagonium Schrank = Adesmia DC. 
Patrinia Juss. Valerianaceae. 13 sp. E. As. 
Paullinia Linn. Sapindaceae (1). 120 sp. trop. and sub-trop. Am., 
1 in Madag. and Afr. Lianes with watch-spring tendrils (p. 172). 
Fruit a capsule, often winged. 
Paulowilhelmia Hochst. Acanthaceae (iv. A.). 5 sp. trop. Afr. Seeds 
often with toothed scales, spreading when wetted. 
Paulownia Sieb. et Zucc. Scrophulariaceae (11. 6). 2 sp. Chi., Jap. 
Trees (rare in S.). P. imperialis S. et Z. is often cult, in parks. 
Pavetta Linn. Rubiaceae (11. 14). 70 sp. palaeotrop. The leaves of 
many sp. have little warts inhabited by bacterial colonies (Zimmer- 
mann in Prings. Jahrb. 37, 1901, p. 1). 
Pavia Boerh. = Aesculus Linn. 
Pavonia Cav. Malvaceae (ill). 70 sp. trop. and sub-trop. There are 
5 cpls. and 10 styles, 5 of these corresponding to cpls. which abort in 
development. The cpls. are hooked in fruit. 
Pavonia Ruiz et Pav. = Laurelia Juss. 
Payena A. DC. Sapotaceae (1). 16 sp. Malaya. P. Leerii Kurz 
yields a good gutta percha (see Palaquium), known as Gutta Sundek. 
Pectis Linn. Compositae (vi). 50 sp. Arizona to Brazil. 
Pedaliaceae. Dicotyledons (Sympet. Tubiflorae). 14 gen. with 45 sp. 
trop. and S. Afr., Madag., Indo-mal., mostly shore and desert plants. 
Herbs or rarely shrubs with opp. leaves and glandular hairs. Firs, 
solitary or in cymes (usually 3-flowered), with glands (metamorphosed 
flrs.) at the base of the stalks, $ , zygomorphic. K (5) ; C (5) ; A 4, 
didynamous, with a posterior staminode ; G (2) [G in Trapella], with 
