288 XXXI. zYGOPHYLLEiE (oliver). [Seetzenia. 



Leaflets flesliy, apiculate, the median obovate-cuneate, lateral oblique, ^ in. 

 long, more or less, rarely ^ in., exceeding or equalling the petiole. Pe- 

 duncles -i— ^ in., at length more or less recurved at the apex. Fruit ellip- 

 soid or subglobose, the carpels separating longitudinally and exposing the 

 smooth crustaceous endocarp more and more as it matures, ;|— ^ in. long. — 

 S. orientalis, Decne. in Ann. Sc. Nat. Ser. 2. iii. 281. t. 7. Zyyophylluin 

 prostratum, Thunb. fide Sond. Fl. Cap. i. 366. 



Nile Iiand. Upper Egypt ! 



With regard to ZygojthyUum. lanatum^ Willd., referred to above, it is described as woolly 

 at the articulations and with loug filiform styles, characters which do not well apply to the 

 specimens which I have seen. 



5. NITRARIA, Linn. ; Benth. et Hook. f. 1. c. 265. 



Calyx small, usually 5-fid, persistent. Petals 5, rather fleshy, concave, 

 induplicate-valvate. Stamens 15, rarely fewer; filaments naked, subulate. 

 Ovary oblong-conical, " 2-6-celled with a solitary ovule in each cell;" stigma 

 3-(2-6-)lobed ; lobes adnate, shortly decurrent ; ovules ascending from pen- 

 dulous funicles, adnate near the middle. " Fruit narrow-conical, \ in. long 

 or less, with a thin pulpy epicarp and bony, longitudinally-sulcate, 1 -seeded 

 putaraen, separating into 6 subulate teeth at the apex. Seed exalbuminous." 

 — Glabrous or shortly silky-hoary shrubs, spinose or unarmed. Leaves alter- 

 nate or fasciculate, spathulate or cuneate, minutely stipulate. Flowers in 

 lateral scorpioid or corymbose cymes, sessile or pedicellate, white. 



The two following are the only species of the genus which I have seen. 



Leaves oblanceolate or spathulate, entire, usually obtuse. Flowers sessile 



or subsessile 1. iV. Schoberi. 



Leaves obovate- or oblanceolate-cuneate, usually 3-toothed at the apex 



more or less. Flowers usually distinctly pedicellate 2. N. tridentata. 



1. W. Schoberi, Linn.; DC. Vrod. iii. 456. A hoary or glabrous 

 shrub with rigid, often long, decurved branches, with or without short, 

 lateral, spinose ramuli. Leaves fleshy, fasciculate, oblanceolate- or obovate- 

 cuneate to elongate-spathulate, obtuse, entire, glabrous or minutely silky- 

 hoary, -1-1 in. long or more. Flowers in lateral subpaniculate scorpioid or 

 corvmbose cymes, exceeding the leaves, sessile or subsessile. — N. senegalensis, 

 Lain. ; DC. Prod. iii. 456; Lam. 111. t. 403. f. 2. 



Upper Guinea. Senegal ! 



Also in dry and saline regions of Asia and Australia. 



2. N. tridentata, Besf.; DC. Prod. iii. 456. Differs from the usual 

 forms of N. Schoberi in its more obovate-cuneate leaves usually 3-lobate or 

 3-dentate at the apex, \-^ in. long, 3-5 lines broad, and in the pedicellate 

 flowers ; pedicels frequently \ in. long or more. — Jaub. et Spach, 111. t. 293, 

 and N. sericea, t. 294. 



I have no record of the occurrence of this species between the tropics, Caillaud (fide 

 Delile, Voy. a Meroe, 99) found it at Rayan, between Fayoum and Syouah. M. Boissier 

 reduces N. senegalensis, Lam. Encycl. iv, 493, Iliust. 403. f. 2, to this species, but I think 

 our Senegal specimen and Lamarck's figure agree better with N. Schoberi. The fruit of 



