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SPENCKR 3I00ilE: GAMOPETAL^. ' ^i^l 



lon*^. ; staminUms supra medium tubinn inscrtis aiitlieris ovatis apiculatis 

 1 nun. long. ; carpellls glabris Ix '75 jnni. ; stylo in toto C'5 mm. long. 



Among rocks of Kiv* Comljoui ; 400 it. ; serpentine. 21G8. Tree 25 Ft/; 

 rough dark bark ; copious wliite latex becoming sticky at once. Corolla 

 pinkish white, sweet-scented. Fruit not seen, but, judging from the carpels, 

 very like that of I\ ComptoniL No. !)00 from Kuakue edge of forest by river- 

 side, 100 ft.; serpentine, should be referred here. It is a shrub 4 ft. high 

 with erect stem* Leaves somewhat more shining than those of P. ComptoniL 

 Corolla white, tinged magenta, sweet-scented. This is apparently a state of 

 the plant flowering before attaining its full stature. . . ■ ■• 



Baillon in a short diagnosis oiPterochrosia (Hist, des Plantes, x. p. 194) 

 says there is no diftcreiice as regards the flowers between it and Cerhera^ 

 l^terochrosia being characterized by its samaroid as distinguished from 

 Cerhera^s drupaceous fruit. But he also says the corolla-lobes overlap to the 

 right, whereas those of Cerhera (and of tlic two species here described) 

 overlap to the left. Tn these circumstances, and seeing how the two state- 

 ments are contradictory, we may assume that "dextrorsum " has been 

 Avritten inadvertently for '' sinistrorsum " in Baillon^s description. A formal 

 diagnosis of the genus is appended herewitli. 



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Pteeochrosia XjiiiW.^ Aiwcynaceamm e ivWm rhnneriearinn genus^ 



Calyx 5-partituSj intus eglandulosus. Corolla hypocrateriformis, tubo 

 calycem excedente inferne cylindrico superne dilutato supra staminum inser- 

 tioneni squamis 5 pubescentibus onusto, fauGil)us baud vel vix contractis ; 

 limbo 5-lobo lobis sinistrorsum obtegentil)us. Stamina supra vel infra medium 

 tubum inserta; antherae parv;x? loculis basi inappendiculatis. Ovarii carpella 

 2j distincta ; stjdus filiformis, inferne sejunctus, superne in stigma crassum 



appendice prominento biloba onustum subito dilatatus; ovula quove in 

 loculo 2. Fruclas samaroidouSj abortu unicus, oblongus vel vespertih"oni- 

 formis, coriaccus, 1-spermus. Semina compressa. cxalbuminosaj cotyledonibus 

 -carnosis. — Fnitices vel arbusculrc. Folia alterna^ casu opposita vel sub- 

 opposita, crebro penninervia, coriacea. Flores modiocres prominent er 

 bracteatij in paniculas vel corymbos ex racemis compositis constautes 

 ordinati. 



Generis species tres prima visu ita distingucnda) sunt : ' 



§ Euryptera. ' . . . , 



Samara alis latis transversis pricdita jP. VieiUarJu 



§ Leptop)tera. 



Samara alis oblongis pracdita — 



Tnflorescentia sublaxa, Bracteae mox dccidua?. 



Stamina infra medium tubum inserta P, Comptonii. 



Tnflorescentia fastigiata. ]^)ractea? diutule per- 

 sistentes. Stamina supra medium lubum 

 inserta . , P. veriifolia. 



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