146 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



6. LEUCAENA Benth. 



Leucaena Benth. Hook. Journ. Bot. 4: 416. 1842. 



Flowers 5-merous, sessile, usually hermaphrodite; calyx tubular-campanulate, 

 dentate; corolla free; stamens 10, exserted; ovary stipitate, multiovulate; style fili- 

 form; legume stipitate, broadly linear, flat, coriaceous, 2-valved, the valves continu- 

 ous; seeds flat, ovate, transverse. Trees or shrubs, unarmed; leaves bipinnate, the 

 rachis with or without glands; the leaflets small, multijugate, or large and pauciju- 

 gate; stipules minute; flower-heads white, axillary, fascicled, or racemose at the 

 extremities. 



1. Leucaena g-lauca (L.) Benth. 



(Urban, 266.) 



Tree 10 to 20 meters high, rarely a shrub, unarmed; pinnae 4 to 8-jugate; leaflets 

 10 to 20-jugate, oblong-linear, pointed, oblique at the base, 11 to 16 mm. long, 4 mm. 

 wide; flowers minute, white; legume glabrous, 10 to 15 cm. long; seeds compressed, 

 transverse to the valves. 



Near Bayamon, in mountain forests and thickets; near Comerio, in thickets; near 

 Coamo, in the valley of Quebrada, Morena brook; near Guanica, in the forest of 

 Mount El Maniel; near Mayaguez. Bermuda, Bahama, Cuba, Jamaica, Cayman 

 (Hitchcock), Haiti, St. Thomas, St. Croix, St. John (Eggers), St. Martin (Stockholm 

 Herbarium), St. Kitts, Antigua (Grisebach), Guadeloupe, Dominica, Martinique, 

 St. Vincent, Bequia (Kew Bull. no. 81, p. 250), Mustique (do.), Barbados, Grenada, 

 Tobago, Trinidad, Curacao. In the warmer regions of both hemispheres, but proba- 

 bly indigenous only in tropical America. 



The firm wood of Leucaena glauca is used for making tools, and the young fruit 

 and the ripe seeds are eaten raw with rice. By some authors given as a tree (Urban), 

 by others as a shrub (Stahl, cited by Cook and Collins, p. 175). 



Local names, acacia pdlida (Urban); hrdiondilla (-Cook and Collins). 



7. SCHRANKIA Willd. 



Schrankia Willd. Sp. PI. 4: 1041. 1806, not Medic. 1792. 

 Lcptoglottis DC. Mem. Legum. 451. 1825. 

 Schranckia Benth. Hook. Journ. Bot. 4: 413. 1842. 

 Morongia Britton, Mem. Torr. Club 5: 191. May, 1894. 



Flowers 5 or 4-merous, pedicellate, hermaphrodite or polygamous; calyx minute; 

 corolla funnel-form, the segments connate to the middle; stamens twice as many as 

 the petals, free or cohering at the base, exserted; ovary subsessile, multiovulate; 

 style filiform; legume linear, subquadrangular, aculeate throughout with spreading 

 prickles, the valves separating from the persistent sutural replum; seeds oblong, 

 quadrangular. Herbs or undershrubs, armed with short recurved prickles; leaves 

 bipinnate; flower-heads globose, white or purple, axillary, solitary or fascicled, the 

 stamens in the male flowers often flatly compressed. 



1. Schrankia portoricensis Urb. 



(Urban, 267.) 



Shrub, climbing; branches glabrous or at leaf insertions slightly hairy; leaves 7 to 

 12 cm. long with petioles 3 to 4 cm. long; pinnae 4 to 7-jugate; leaflets 15 to 20-jugate, 

 linear, obtuse or Bomewhat acute, 3 to 6 mm. lonjj, the veins inconspicuous, gla- 

 brous; flower heads axillary, solitary. 6 to 8 mm. in diameter, light yellow; calyx 



a Cook and Collins, p. 194, as Morongia distachya. 



