31. RTJTACE.E. 103 



Psilopegantjm, Hemsl., gen. nov. 



Calyx 4-partitus, persistens. Petala 4, sessilia, oblongo-ovalia, 

 integerrima. Discus parvus, fere obsoletus. Stamina 8, alterna 

 breviora, filamentis subulatis ; antherse oblongae. Ovarium ses- 

 sile, alte bilobum, lobis 1-locularibus ; stylus unicus, stigmate 

 simplici ; ovula in loculis 5-6, placentis a medio loculi pendulis 

 affixa. Cocci 2, basi connati, divergentes, membranacei, inflati, 

 apice (ventre) dehiscentes. Semina reniformia, testa cinerea, 

 Crustacea, scrobiculata ; albumen carnosum ; embryo teres, 

 curvus. — Herba perennis, glanduloso-punctata, caulibusnumerosis 

 gracilibus. Folia alterna, trifoliolata. Floret parvi, solitarii, 

 extra-axillares, graciliter pedunculati. 



1. Psilopeganum sinense, Hemsl., n. sp. (Plate III.) 



Planta circiter sesquipedalis, undique glaberrima, caulibus 

 ramulisque fere filiformibus erectis. Foliola breviter petiolu- 

 lata, tenuissima, leviter insequalia, ovalia, oblonga, ovata vel 

 obovata, maxima vix pollicaria, obtusiuscula, subtus pallidiora, 

 margine leviter revoluta crebre glandulosa, lateralia interdum 

 leviter obliqua ; petioli atque pedunculi filiformes, 6-9 lineas 

 longi. Flores, ut videtur, albi, 3-4 lineas diametro; calycis 

 segmenta obtusa. Fructus late bilobus fere reniformis, 4-5 

 lineas latus. 



Hupeh : Ichang Gorge (Maries !), near Ichang (A. Henry !) ; 

 Szechuek : Chungking {Bourne^. Mus. Brit. ; Herb. Kew. 



This differs from Boenninyhausenia, which it very strongly 

 resembles in general appearance, in having trifoliolate leaves, 

 solitary extra-axillary flowers, a very small disk, and a sessile 

 two-celled ovary. Thamnosma has a dimerous pistil, associated 

 with, simple leaves and a very different habit. 



1. Peganum Nigellastrum, Bunye, Mum. PI Chin. Bor. p. 13 ; 

 Hance in Journ. Linn. Soc. xiii. p. 76. 



Noeth China, without locality (Bunyel); Chihli: Chatau 

 ( Williams ex Hance). Herb. Kew. 



Mongolia. 



1. Dictamnus albus, Linn. Sp. PI ed. 1, p. 383 ; Hook.f. Fl. 

 Brit. Ind. i. p. 487. 



Dictamnus Fraxinella, Pers. Syn. PI. I V- 464 "> DC - Prodr - l ' P' 712 ; 

 Baker et S. Moore in Journ. Linn. Soc. xvii. p. 380. 



