CONVOLVULACEAE. — PORANA 357 



Western Szech'uan: Tung River valley, near Wa-shan, alt. 100- 

 900 m., September, 1908 (No. 3220, type; climber 2.5-5 m. tall, 

 flowers beautiful blue) . EasternSzech'uan: without precise locality, 

 A. Henry (No. 8866; distributed as Parana? aff. P. grandiflorae 

 [= Ipomaea No. 26^ of Ind. Fl. Sin.]). Yunnan: Mengtsze, woods, 

 alt. 1500-1600 m., A. Henry (Nos. 9229, 9229" partim; large climber, 

 lavender flowers). 



Without having seen the fruits of var. lasia (p. 362) I should have taken this 

 species for an Ipomaea.^ It is somewhat similar to P. grandijlora Wallich, from 

 which it differs as indicated in the key, p. 358, especially by the stamens inserted in 

 3 rows in the tube and not at the same height. 



To describe this new species correctly I was obliged to look over all the species 

 of Porana that have been described, and have prepared the following short synopsis 

 of them, adding descriptions of three new species and a variety collected by Henry 

 in Yunnan. 



CLAVIS SPECIERUM GENERIS PORANAE 2 



Ovaria ovulis 4 instructa; stigmata plus minusve globoso-capitata, pleraque latiora 



quam longa; stamina versus basim corollae fere eadem altitudinc inserta 



filamentis liberis aequilongis v. inaequalibus quam antheras semper longiori- 



bus. Corolla plus minusve campanulata .... Subgen. 1. EUPORANA. 



Sepala omnia in flore aequalia. 



Stamina inaequalia, tria longiora corollam aequilonga v. superantia, dua 

 breviora in tubo inclusa. 

 Stylus ovario 4-5-plo longior, apice bipartitus; discus nullus; sepala in 

 flore satis lata, oblongo-elliptica, in fructu omnia amplificata. 



1. P. volubilis. 

 Stylus ovario subbrevior, simplex; discus satis distincte evolutus; sepala in 



flore anguste lanceolata, in fructu ignota 2. P. disci/era. 



Stamina subaequalia, in tubo inclusa; stylus ovario brevior; sepala in fructu 



tantum tria valde amplificata 3. P. paniculata. 



Sepala in flore inaequalia; stamina subaequilonga, stylus iis sublongior. 



Flores aperti vix ad 2.5 cm. lati tubo circiter 8 mm. longo; sepala tantum 2 

 in fructu valde amplificata, ad 7 cm. longa. 4. P. sinensis. 



^ This Ipomaea is said by Hemsley to be " /. cocdnea simillima sed sepalis 

 puberuhs exapiculatis "; it apparently has nothing to do with our plant. 



2 I do not know P. Esquirolii Ldveilld (in Fedde, Rep. Spec. Nov. IX. 444 [1911], 

 of which the author gives only the following short description: " Affinis P. pani- 

 culatae Roxb. a quo tamen differt sequentibus not is; plant a tot a villosa subtus in 

 foliis et floribus tantum rufo-tomentosa; petioli 3-5 cm. longi, sepala lanceolata 

 obtusa; flores coerulei." Collected in Kweichou by J . Esquirol (No. 976.). 



I have not been able to see the descriptions of P. Delavayi, P. Duclouxii, 

 and P. Mairei published by Gagnepain in Lecomte's Notulae Systematicae, III. 

 fasc. 5, as no parts of this publication have been received here since 1913. Also 

 fascicle 3 of Lccomte, Fl. Gen. Indo-Chine, vol. IV., has not been received; this 

 contains Convolvulaceae by Gagnepain & Courchet with 3 species of Porana of 

 which P. spectabilis Kurz is figured. I unfortunately did not know of these 

 publications until after this paper was in type. 



