MITTEILUNGEN AUS DEM BOT. MUSEUM DUR UNIVERSITÄT ZURICH. XXXII. 809 



und Narbe messen zusammen ± 27 mm und zwar entfallen hievon auf 

 den Fruchtknoten allein 4 mm, auf den Griffel, der eines Papillen- 

 wulstes entbehrt, + 21 mm und auf die kopfig zungenförmige Narbe 

 2 mm. 



Benguella : am Ufer des Hamba, eines linksseitigen Nebenflusses des 

 Gambo, Mechow 503. 



Exochsenium gracile (Welw.) Schinz. 



Belmonlia gracüis Welw. in Trans. Linn. Soc. XXYII (1869), 47'; 

 Parasia gracüis Hiern Cal. of Welw. Afr. PI. III (1898), 708 2 . 



1 Gaule ereclo, 4-gono, filiform!, simplici vel parce ramoso; foliis angusle 

 lineari-lanceolatis linearibusve, internodiis brevioribus, canaliculatis, basi seuii- 

 amplexicaulibus; calycis profunde 5-parlili segmentis lato-lanceolatis, longe acu- 

 ininatis, margine late membranaceis, dorso alato-carinatis; corollae tubo gracili, 

 sursum arnpliato, liinbi 5-fidi lobis ovatis apiculatis patulis; antheris quam fila- 

 nienla brevioribus, glandula elongato-claviforini superatis; stigmate oblongo- 

 clavato, stylo recto vix breviore, apice subbilobo. 



Stirps annua, reliquis generis speciebus multo gracilior. Radix brevis, 

 tenuiter fibrillosa. Cauliculus filiformis, 3-5 pollices altus, erectus, nunc siinpli- 

 cissimus uniflorus, nunc ramulo uno alterove lalerali bi- vel triflorus, foliorum 

 paribus 3 vel 4, pollicem vel sesquipollicem in ter se distantibus veslitus. Folia 

 ima superioribus duplo breviora et angusliora, illa in medio caulis sita 5-6 lin. 

 longa, l /a vel 2 /z lin. lata, patula, herbaceo-viridia. Flores parvi, longe peduncu- 

 lati, lutei, subnutantes; pedunculi nudi, in speciminibus unifloris 2-3 pollices 

 longi, erecti, cauliculum terminantes, iis ramulorum lateraliuni vix pollicaribus 

 et erecto-patulis. Calycis segmenta a basi ad medium usque late membranaceo- 

 marginata, demum subulatim acuminata, dorso carinato breviter alata, corollfc 

 tubo paullo breviora. Corolla omnino Belmoiitiœ cordatœ var. micranthœ, 

 quacum etiam glandularum minutarum glomerulis inler calycem et corollam 

 obviis convenit. Antberae in tubi parte superiore dilatala inclusae, fdamentis 

 breviores, glandula gracili cylindrico-clavata, erecta, ceraceo-aurantiaca ter- 

 minatae. Ovarium oblongo-ovoideum, bisulcatum, biloculare, placenlis latius- 

 culis septulo contiguis. Stylus rectus, firmulus: stigma pro more floris sat 

 magnum, elongato-clavalum, apice nunc obiter bilobum nunc integrum, fere 

 styli longiludine, stamina vix superans. Capsula ovoidea, corolla marcescenle 

 vestita, bivalvis, bilocularis, placentis demum liberis induratis. Semina nume- 

 rosissima, placentis immersa, quadrangulo prismatica, testa tenuissime dense 

 papulosa. 



2 Huilla. — An annual, lillle herb, % l /2 to 6 in. high, wilh the habit of a 

 maritime Cenlaurium but more slender; stem filiform, nearly naked, tetragonal, 

 erect, very sparingly branched ; leaves opposite, linear-lanceolate, channelled, 

 erect-spreading, semi-amplexicaul at the hase, somewhat decurrent; iuternodes 

 long; flowers yellow, pentamerous, rather large, 1 to 3, erect, rather lax; calyx 

 deeply cleft; the segments long-acuminale, winged-keeled, broad at the base, 



