TROPICAL AMERrCA>- RUBIACE.T, 173 



4. Sipanea biflora Linn. lil. Suppl. 184 ; Cham. & Schlecht. in 

 Liniiiea, iv. 108.* S. radicans Endl. Ataet. vii. t. 7. Boudeletia 

 biflora Rottb. PL Sur. vii. t. 2. f. 2. 



Guiana: DahlhergX Hostniarui 1121; Venezuela: — Orinoco R., 

 near Maypures, >Syjrwct' 3(520 ! Brasil : Sellol Blanchet 14iSdl 



o. Sipanea prateiisis Aubl. PI. Guian. i. 147, t. 56. S. dicho- 

 toma H. B. & K. ex Benth. in Hook. Journ. Bot. iii. 218, 



Guiana : Aiiblet ! Schomburfjk 15 ! 95 ! SpUff/erber (Herb. I)e 

 Vriese) ! Berthoud Couloii 17(3! Trinidad: in grassy places near 

 La Bray. 



This species, the type of the genus, may be regarded as the 

 jiarent-species of the four preceding, wdiich, like it, are more or less 

 slender and even delicate plants, inclined to creep or straggle, smooth 

 and tending to glabrousness ; the}'' are distinguished also by the rela- 

 tively large corolla-limb. The remiining species are loosely connected 

 Avith the above group by way of IS. (/labrata, about to be described. 

 They form a group with S. his p Ida in the centre, being coarser, more 

 or less hispid plants, more or less rigidly erect and branching from 

 the base, with characteristically small corolla-limb. 



6. Sipanea glabrata, sp. nov. Herba parva e basi ramosa, 

 caulibus plus minus virgatis in nodis tumidis densiuseule appresse 

 pubescentibus. Folia latiuscule lanceolata utrinque acuminata acuta, 

 supra nisi in venis minute hirtella glabra, subtus in venis densius hir- 

 tella "filter glabra ta, brevissime petiolata ; stipulcd obsoleta? v. bre- 

 vissime setaceo-acuminatae. Flores parvi in cymulis in anthesi sub- 

 capitatis demum laxescentibus 5-6-lloris dispositi. Calycis lobi 

 sparsissime hirti, nonnunquam fere glabri lineares acuminati. Corollce 

 tubus extus infra glaber insuper griseo-])ilosus parum ampliatus, lobi 

 late necnon breviter ovati apice rotundati. Capsula (immatura) 

 densissime sericeo-pilosa, calycis lobis fere glabris persistentibus 

 corona ta. 



Brasil : Matto Grosso, S. Anna da Chapada, 28 June, 1902, 

 Bobert 333 ! 364 ! 



Leaves db 4 cm. X 1"2 cm. C'rt/y.i- lobes 3*5 mm. C'oroZ/rt-tube 

 1 cm. ; lobes, 2 mm. X 2*7 mm. Allied to S. hispida Spruce, but 

 easily distinguished by the nearly glabrous leaves, the obsolete stipules, 

 and the ver}^ small corolla-limb, barely half a centimetre in diameter. 



7. Sipanea hispida Benth. MS. in Herb. Mus. Brit. ^. prafensis 

 K. Sch. in Mart. PI. Bras. vi. vi. 249 (non Aubl.). 



Herba hirsuta erecta, pauUo ramosa, caule crassiuscula, basi sub- 

 lignoso, insuper dense hispidulo. Folia papyracea, elliptico-lanceolata, 

 acuminata apice acuta, basi acuta, utrinque prsesertim in venis sub- 

 hispido, venis secundariis utrinque 5-8, subsessilia nonnunquam 

 brevissime petiolata ; stipidm e basi lato breviter oblongo subito in 

 acuminem longiusculum productse. Flores in capitulis primo inter 

 minores 5-12-tloris, demum in cymis elongatis ])lus minus- secunde 

 dichotomis dispositi, bracteis linearibus v. lineari-lanceolatis simplici- 

 bus. Calycis lobi lineares acutissimi pilosi tubo densissime sericeo. 

 Corollas tubus breviusculus extus basin versus pilosus. insuper glabres- 



