2 CXXVIII. NYCTAaiNE^. 



Species ad 215, regionura tropicarum at calidiorum totius orbis imprimis Americse ineolae, in 

 Australia rariores, in Africa, Boerhaavia excepta rarissimse. 



Ordo uuUi arete afRnis, sed evidenter juxta Fhytolaccaccas bene collocatus ; habitu, gestivatione, 

 absentia stipularum, stylo simplici, et indole embryonis sat diversus. 



FORM^ ABNOSMES. 



Flores racemosi in S&iikcnhergia, 



Stamina tubo poriautliii cohgerentia in Abronia ; antherse magnge introrsum dehiscentes in 

 Lettcastere. 



Perianthium simpliciter valvatum in Boldoay Collignonia et ? in Andradea. 

 Stigma sessile, vertice ovarii longitudinaliter obductum in HeickenhacMa, 

 Embryo fere annularis in Cry-ptocarfo ; cotyledon unica in Ahronia. 



CONSPECTUS GENEKUM. 



Tribus x* Mirabiliese. Utriculus basi perianthii accrescontis apice clausi inclusus. 

 Embryo uncinatus; cotyledones latse et convolutse v. angnstse et planae ; radicula elongata, descen- 

 dens, extraria. 



Subtribus 1. Boerhaayieae. Perianthii llmhus jjUcaius. Stamina hyjpogyna, smpnts esserta ; 

 anth€r(B didymce. Stiyma capitellatum. Cotyledones latce. Folia oppodta, 



* Flores involitcrati, bracteis connatis. 



1. MiRABiLis. PeriantKium elongatum, rarius canipanulatum, Involucrum post anthesin 

 inunutatum. — Amer. oocid. 



2. OxYBAPHus. PeriantKium breve, campanulatum v. infundibulare. Involucrum post 

 anthesin ssepius accrescens, rotato-campanulatum, venoaum. — Amer. occid., Himalaya, 



** Flores iuvoliicraH, bracteis liberis. 



3. Ntctaginu. Involucrum poJyphyllum, multiflorum. Stamina 5. Anthoearpium tur- 

 binatum, multicostatum. — Texas. 



4. Allionia. Invuluerum 3-pliyllum, 3-fl.orum. Stamina 4. Anthoearpium hinc profunde 

 sulcatum, marginibus ineurvis spinoso-dentatis.— ^mcr. hor. occid, 



F 



*** Flores exinvolucratt, bracieolati {in Boerhaaviis paucis involucellati). 



5. BoEKHAAviA. Flores paniculati v. umbollati. Stamina 1-5. Anthoearpium teres, 

 costatum v. 5-gonum. — JJtriusqite orbis reg. trop. 



6. Senkenbebqia. Flores racomosi. Stamina 3-5. Anthoearpium costatum v. gibbosum. 

 — Mexico, 



7- AcLBiSANTHES. Flores capitati. Stamina 2-5. Anthoearpium costatum.— TV^^.s, Nov. 

 Mcx, 



8. SixiKOCABPUs. Flores 1-3. Stamina 2-5. Anthoearpium late alatum.— iVbu. Mex, 

 ©, Okeku. Flores solitarii. Stamina 15-18. Anthoearpium couUXnm,— Mexico, 



**** Flores exinvolucrati, cosiis bractearum foUacearum imbricatanm siiigtdatim inscrti, 

 10. BJEBMiBnTM.— .^wer. bor. (Nevada). 



Subtribus 2. Bougainvillasese. Flores exinvolucrati, cosiis bractearxm inserti, Perianthii limbus 

 plicaius. Stamina hypogyna, iTiclusa v, exserta ; anthers didynuB. Stigma laterale. Cotyledones 

 convoluta. Frutices foliis alternis. 



n. Bocgainvill.:ea. Bracte* 3, onines floriforse, sub anthesin amplee.— ^w^-. merid. 



12. TitiCYCLA. Bractese 3, una florifera, sub anthesin parv», demum ampliatEe.— C>^//?. 



Subtribus 3. Abroniese. Flores involucraii. Perianthii limbus plicaius. Stamina iiichtsa, 

 filamentis tubo perianthii cohterentibus ; antltera litieari-obhnga. Stigma Uncare. Cotyledones latcp, 

 convolute, — Herb(E foliis oppositis, * 



13. Abeokia. Florea r.^eeptaculo communi inserti. Stamina 6. Anthoearpium costatum 

 Tr alatum, — ATner, bor. occ. 



