354 löN. Urban: 



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

 in Gm'd. Chron. new ser. XXIII p. 566 (p. ]).), — 7ion B. et Seh. 



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

 (1885) p>- 566 (quoad specim. Hart.). 



Rami alte volubiles, teretes, obsolete plicato-striatiüi, glabri v. bre- 

 viter pilosi, quoad siippetiint, usqiie 5 mm. crassi. Folia petiolis 3 — 8 cm., 

 j)etioliilis 2 — 5 mm. lougis; foliola G^ — 12 cm. longa, 2,5 — 5,5 cm. lata, 

 nervo medio in sulco levi valde anguste prominente, lateralibus ntroque latere 

 5 — 8 sub angulo ca. 60° abeuntibiis, tenuiter prominulis, non anastomosan- 

 tibus nee pellucidis, parce v. parcissime setuloso-pilosa, subtiis 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. rotundata, 6 — 8 mm. longa, 5 — 7 mm. lata, interiora ob- 

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

 tenuiora, omnia nervis pluribus extrinsecus non manifestis percursa, dorso 

 laevia glabra. Corolla 6 — 6,5 cm. longa; tubus basi ca. 4 mm. crassus, 

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

 anguste lanceolati, nervis primariis 5 et pluribus teuuioribus anastomosan- 

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

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

 petali margine prodeuntibus numerosis percursae. Stamina tubo corollino 

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

 centia; antherae lineares, superne attenuatae, in 1/5 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, 6 mm. longa, 3 — 4 mm. lata, margine dense pili- 

 fera, pilis 10 — 12 mm. longis. 



Hab. in Jamaica: Hart n. 994, in Yallahs Valley 560 m. alt, m. 

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



Obs. I. In herb. Grrisebachiano duae plantae aliae a cl. March collectae 

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

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

 dioribus, altera foliolis saepius 3 — 4 pilosis, longius (usque 7 mm. longe) 

 petiolulatis, corollae tulto ut videtur obscurius rubro, limbo pallidiore. Sed 

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



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

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

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

 deficientem non describenda (mus. Monac). 



Ipomoea 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. crasso coriaceis; pedan- 



