354 Ion. TTrban: 



Ipomoea macrorrhixa Griseh.! Flor. (1861) p. 471 (p-p.); Mast, 

 in Gard. Chron. new ser. XXIII jd. 566 (p. p.), non R. et Seh. 



? Ipomoea Horsfalliae Mast, in Gard. Chron. neiv ser. XXIII 

 (1885) 2J- 566 (quoad specim. Hart.). 



ami alte volubiles, teretes, obsolete plicato-striatuli, glabri v. bre- 

 viter pilosi, quoad suppetunt, usque 5 mm. crassi. Folia petiolis 3 8 cm., 

 petiolulis 2 5 mm. longis; foliola G- 12 cm. longa, 2,5 5,5 cm. lata, 

 nervo medio in sico levi valde anguste prominente, lateralibiis ntroque latere 

 5 8 sub angnlo ca. GO*^ abeimtibiis, tenuiter prominulis, non anastomosan- 

 tibus nee pellucidis, parce v. parcissime setuloso-pilosa, subtus brevius, v. 

 glabra, margine subcalloso integra. Inflorescentiae pluriflorae, semel more 

 trichasii, deinde v. ab initio cymose divisae v. cincinnose evolutae; prophylla 

 decidua. Sepala coriacea, inaequalia, exteriora breviter ovata v. ovalia, 

 apice obtusa v. rotnndata, G 8 mm. longa, 5 7 mm. lata, interiora ob- 

 ovata, concava usque 9 mm. lata, apice rotnndata v. obtusissima, margine 

 tenuiora, omnia nervis pluribus extrinsecus non manifestis percursa, dorso 

 laevia glabra. Corolla G G,5 cm. longa; tubus basi ca. 4 mm. crassus, 

 ad medium (in statu compresso) 15 19 mm. latus; limbi radii mesopetali 

 anguste lanceolati, nervis primariis 5 et pluribus tenuioribus anastomosan- 

 tibus; areae commissurales radios 10 mm. longe superantes, valde amplae, 

 medio leviter emarginatae, late semiorbiculares tenues, nervis e radii meso- 

 petali margine prodeuntibus nuraerosis percursae. Stamina tubo corollino 

 7 mm longe adnata, basi 4 mm. longe pilis simplicibus densissime pubes- 

 centia; antherae lineares, superne attenuatae, in Y5 alt. affixae, 5 mm. longae. 

 Discus brevissime cupulif ormis , crasse carnosus, margine undulatus. Ova- 

 rium 2-loculare, ovulis in quoque loculo 2, a dorso anguste ovatis, margine 

 brevissime pilosis, in stylum subcontractum ; Stigma didymum, lobis con- 

 natis subglobosis tuberculatis. Capsula 8 9 mm. diametro; valvae ellip- 

 ticae 12 13 mm. longae, 6 7 mm. latae. Semina (non plane matura) 

 ovata V. latiuscule ovata, G mm. longa, 3 4 mm. lata, margine dense pili- 

 fera, pilis 10 12 mm. longis. 



Hab. in Jamaica: Hart d. 994, in Tallahs Valley 560 m. alt, m. 



Sept. flor.: Harris n. 6839, prope Moneague in Guy's Hill: Alexander. 



Obs. I. In herb. Grisebachiano duae plantae aliae a cl. Maech collectae 

 sub nomine /. macrorrhixae asservantur, altera speciei descriptae similior sed 

 foliis chartaceis, floribus majoribus usque ad 8 cm. longis ut videtur palli- 

 dioribus, altera foliolis saepius 3 4 p)iiosis, longius (usque 7 mm. longe) 

 petiolulatis, corollae tubo ut videtur obscurius rubre, limbo pallidiore. Sed 

 quia fragmenta tantum inter sese mixta praebent, nil certi dici potest. 



Obs. II. Planta a cl. "Wullschlajegel in Jamaica prope Fairfield (sub 

 n. 926) lecta differt ramis elevatim striatis v. angulatis, foliolis 4 5, sepalis 

 interioribus 14 15 mm. longis obscure coloratis differt, sed ob corollam 

 deficientem non. describenda (mus. Monac). 



Il)omoea teriiata Jacq. foliolis 3, rarissime in eodem ramo 4, 

 ovatis, late ovatis, subrhombeis, obovatis v. anguste ovalibus, basi rotun- 

 datis usque acutatis, manifeste, brevissime v. vix petiolulatis, apice nunc 

 breviter, nunc longiuscule acuminatis, coriaceis v. crasse coriaceis; pedun- 



