246 A FLORA OF MANILA 



nearly white. Pod 5 tQ 10 cm lonfr, flat, 6- to. 10-seeded. (Fl. Filip, 

 pi: SOI.) 



Quite common in thickets, often cultivated; throughout the Philippines, 

 but certainly introduced. Cosmopolitan in the tropics. 



32. PA ROSE LA Cavanilles 



]E!rect, branched, glandular-punctate herbs with alternate, odd-pinnate 

 leaves, the leaflets small, numerous. Flowers blue or purplish, in dense, 

 terminal, peduncled, or su^sessile, head-like spike's. Calyx-teeth subequal. 

 Standard bro^d, clawed, ^ase of the limb cordate or auricled; wings and 

 kael usually longer than the standard, their claws usually adnate to the 

 staminal tube. Stamens 10 or 9, monadelphous. Pods membranaceous, 

 included in the calyx, usually l-seede^ and indehiscent. (Anagram of 

 Psoralea, an allied genus.) 



Species 100 or more mostly in North America, few in South America, 

 1 Mexican species introduced and thoroughly naturalized here. 



1. P. 6LAN0xnx>SA (Blanco) Merr. (Paoralia nigra Mart. & Gal.). Dura 

 (Tag.). 



An erect, branched, nearly or quite glabrous herb 30 to 60 cm high, the 

 stems reddish or purplish. Leaves about 3 cm long; leaflets linear to 

 narrowly oblong; obtuse, 4 to 10 mm long, prominently glandular-punctate 

 beneath. Spikes dense, capitate ovoid to oblong, 1 to 2 cm long. Flowers 

 very numerous, each substended by a lanceolate, long-acuminate, pubescent, 

 glandular, 6 to 7 mm long bract. Caljr:; greenish, hirsute, Corolla, includ- 

 ing the slender white tube, about 7 mm long, the limb blue, exserted. Pod 

 small, pubescent. 



Very common in open dry lands, San Pedro Macati, etc., fl. Sept.-Feb.; 

 locally common in Luzon. A native of Mexico thoroughly naturalized here, 

 but not reported from any other part of the Orient. 



33. PTEROCARPUS Linnaeus 



Trees with odd-pinnate leaves, the leaflets ovate, entire, alternate. 

 Flowers yellow, in axillary panicled racemes, the pedicels jointed at the 

 apex. Calyx turbinate, curved in bud, the teeth short. Petals exsertad, 

 long-clawed, the standard and wings crisped. Staminal sheath slit above 

 and below or only above, the upper stamen often nearly or quite free. 

 Ovary 2-ovuled; style incurved. Pod orbicular, usually 1-seeded, indehis- 

 cent, surrounded by a broad wing. (Greek "wing" and "fruit.") 



Species 15 or more, cosmopolitan in the tropics, 3 in the Philippines. 



Pods smooth 1. p, indieuB 



Pods covered with slender spreading spines 2. P. eehiTMtus 



1. P. Indlcus Willd. Narra (Tag.); Naga (Vis.). 



A tree reaching a height of 25 m or more. Leaves 15 to 30 cm long; 

 leaflets 7 to 11, ovate to oblong-ovate, blunt-acuminate, 6 to 10 cm lottg, 

 alternate, shining. Panicles axillary, branched. Flowers numerous, yellow, 

 about 1.5 cm long. Young pods pubescent, glabrous or nearly so when 

 mature, orbicular to ofaovate, including the wing 4 to 5.5 cm long} the wing 

 1 to 1.5 cm wide, more or less reticulate and undulate, very shortly beaked. 

 (Fl. Filip pi. 205.) 



A single tree in the old Botanical Garden, fl. Apr .-May; widely distributed 

 in the Philippines. India to China, Malaya, and Polynesia. 



