354 ; Ian. URBAN: 
Ipomoea macrorrhixa Griseb.! Flor. (1861) p. 471 (p.p.); Mast.‘ 
"in Gard. Chron. new ser. XXIII p. 566 (p. p.), — non R. et Sch. 
2Ipomoea Horsfalliae Mast. in Gard. Chron. new ser. XXIII 
(1885) p. 566 (quoad speeim. Hart.). 
 Rami 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 6—12 cm. longa, 2,5 —5,5 cm. lata, 
nervo medio in suleo levi valde anguste prominente, lateralibus utroque latere 
5—8 sub angulo ca. 60° abeuntibus, tenuiter prominulis, non anastomosan- 
tibus nec pellucidis, parce v. parcissime setuloso-pilosa, subtus brevius, Ne 
glabra, margine subcalloso integra. Inflorescentiae pluriflorae, semel more 
trichasii, deinde v. ab initio eymose divisae v. cineinnose evolutae; prophylla 
deeidua. Sepala coriacea, inaequalia, exteriora breviter ovata v. ovalıa, 
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 glabr.. Corolla 6—6,5 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 numerosis percursae. Stamina tubo corollino 
7 mm. longe adnata, basi 4 mm. longe pilis simplicibus densissime pubes- 
centia; antherae lineares, superne attenuatae, in !/, alt. affixae, 5 mm. longae. 
Discus brevissime cupuliformis, crasse carnosus, margine undulatus. Ova- 
rium 2-loculare, ovulis in quoque loculo 2, a dorso anguste ovatis, margine 
brevissime pilosis, in stylum subeontraetum; stigma didymum, lobis con- 
natis subglobosis tubereulatis. Capsula 8—9 mm. diametro; valvae ellip- 
tieae 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. Grisebachiano duae plantae aliae a cl. Marc collectae 
sub nomine I. maerorrhizae 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 tubo ut videtur obscurius rubro, limbo pallidiore. Sed 
quia fragmenta tantum inter sese mixta praebent, nil certi dici potest. 
Obs. II. Planta a cl. Wurzschtaeser 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.). 
Ipomoea ternata 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, apicee nune 
breviter, nune longiuscule acuminatis, coriaceis v. crasse coriaceis; pedun- 
