Onagrarieee.-] MEXICO. 291 



Ord. XXXV. MYRTACEiE. Juss. 



1 . Myrtus communis. Linn. ? 



This differs slightly from the European forms, by the ends of the young branches being covered with a 

 rusty pubescence, and by the larger fruit (5-6 lines in diameter). We have not seen the flower, but so far 

 as we can judge by the remains of the calyx-limb, the segments are obtuse, and often four or five in number. 

 The structure of the seed is that of a true Myrtus. 



1. Eugenia? Capuli. Schlecht. in Linn. 5. p. 561. 



Hae. Acapulco — According to Messrs Lay and Collie, this is called by the inhabitants Capolin. 



Ord. XXXVI. ONAGRARIE/E. Just. 



1. Jussieua salicifolia. H. B. K.? — at tote planta subpubescens, et pedicelli atque 

 fructus ebracteolati. 



2. J. peploides. H. B. K. — -Hab. Talisco. 



3. J. hirta. Vahl. ? — var. pedicellis bracteolas subulatas minutas 1-2 ferentibus. 

 1 . Lopezia hirsuta. Jacq. — Hab. Talisco and Tepic. 



SEMEIANDRA. Nov. Gen. 



Calyx ovario cohaerens, ultra ovarium longe productus, insequaliter infundibuliformis, ad medium in lacinias 

 quatuor lanceolato-lineares elongatas pendulas fissus, lacinia posteriore paullo breviore. Petala quatuor, 

 angustissime linearia, laciniis calycinis breviora, duo inter lacin. calycis posteriorem et laterales in sinubus 

 orta ; duo ad basin utrinque anterioris paullum adnata. Stamina duo, una cum stylo in columnam subcarno- 

 sam longe exsertam tubo calycis toto secus sepalum posterius adnatam connata, superne libera : unum 

 (posterius) in ligulam petaloideam apice expansum ; alterum (anterius) antheriferum. Anthera oscillatoria, 

 bilocularis, loculis parallelis. Ovarium quadriloculare, multiovulatum. Stylus apice subulatus. Stigma 

 capitatum. Capsula globosa, 4-Iocularis, loculicide quadrivalvis, polysperma : dissepimentis placenta; 

 centrali adnatis persistentibus. Semina ovoidea, minuta, muriculata. — Frutex pubescens. Folia opposita 

 vel alterna, ovata vel oblonga, utrinque pubescentia, basi in petiolum attenuata subintegerrima. Racemi 

 terminales foliosi: pedicelli graciles folium florale superantes, fructiferi dejiexi, sub fructu incurvi. 

 Flos sanguineus, sesquipollicem longus. 



I. S. grandiflora. (Tab. LIX.) 



Affinis Lopezia ob stamina duo, uno fertili, altero apice petaloideo, at recedit calycis limbo ultra ovarium 

 producto. Habitus quadammodo Zauschnerice, at charactere multum differ t . 



Tab. LIX. Semeiandra grandiflora. Fig. 1. Flower ; Jig. 2. Capsule ; Jig. 3. Capsule laid open, showing 

 the seeds in the inner angles of the cells : — magnified. 



DIPLANDRA. Nov. Gen. 

 Calyeis limbus alte quadrifidus, paullo curvatus, laciniis duabus superioribus inter se fere ab apice saspius 

 cohaerentibus. Petala quatuor, rotundato-obovata, inclusa, ad basin laciniarum calycis inserta, inoequalia, 

 posterius majus. Stamina duo, antherifera, inter se et a stylo libera. Anthera oblongo-lineares, oscillatori*. 

 Ovarium quadriloculare. Stylus filiformis, inclusus. Stigma parvum, capitatum. Capsula nuda, globosa, 

 quadrilocularis (nunc abortu trilocularis), apice loculicide quadrivalvis, dissepimentis placenta; centrali adnatis, 



