20 MONOGRAPHIA POI-YGALACEARUM. 



squales lanceolato-lineares pedicello iliipin breviores. l'edicelli liirsuli cca 

 2-3 mm. longi. Flores cca 8 mm. longi. Sepala exteriora lauceolalo-linearia, tri- 

 nervia, nervis anastomosantibus, dorsn et margine pilosissima. Alaî '/, longiores 

 laneeolaUB, nervis anastomosantibus, subacul;e, margine longe ciliata3, quam 

 corolla 7j vei l'ère duplo breviores, subherbaceae. Pelala superiora ligularia, basi 

 attenuata, apice obtusa, quam carina fere duplo breviora quam ala3 paulo longiora 

 per 7, cum tubo staminali connata. Carinœ unguicuhim quam limbiis duplo brevius. 

 Filamenta staminum glabra. (Japsula viridis elliptico-orbicularis apice emarginata, 

 compressa, longe ciliata, marginibiis sublatis (inim.) cincta, '/, unn., lierbaeea nec 

 membranacea. Semina cylindrico-conica, briuinea basi umbonata, pilis paucis bre- 

 vissimis donata 4-5 mm. longa. Arillus capitelliformis, dorso breviter calcaratus, 

 corneolus. 



Habitat in Terra mexicana, etiam in Texas apud Rio grande et Rio Frio flu- 

 mima. 



Obs. Cl. A.-W. Bennet, P. ovatifoliam Gray cum, P. ovalil'olia DC (nunc P. 

 myrtilloides Wild.) conjugit (Polyg. Am., p. 4). 



P. OBSCURA Benth. 



Caulis tenuis, basi lignosus, tares, raraosus ; folia auguste elliptica obtusa, vel 

 lineari-lanceolata, mucronata; racemi pauci et laxiflori ; flores médiocres; alae 

 inaequilaterales apice obtus», margine ciliatse, auguste obovatae ; petala superiora 

 carinam subœquantia vel breviora, média parte dilatata, apice attenuata, curvata; 

 filamenta staminum glabra ; stigmata baud bilabiata, inferius vix conspicum pilis 

 paucis formatum; capsula obovata, basi cuneata, brevissime puberula, apice emar- 

 ginata ; seminasubturbinata; arillus ut pallium capitellatum, apice durus rotundus, 

 brunneo-fuscus (capitellum). in appendiculum chlamydeum (pallium) médium 

 semenattingensprolongatmn. Pt. Hartweg. p, oS.P. myrtilloidesGalleotinon Wild. 



Tab. nostr. XIII, fig. 30—32. 



Basi lignosa. Gaules plures erecti vel adscendentes, herbacei, leviter striati et 

 puberuli, subsimplices vel superne ramosi. Caulis infra ramos s;çpe est nudus. Alti- 

 tude tota 1 5-40 cm. Rami graciles simplices pauci. Folia linearia, vel lanceolato- 

 linearia, vel elliptica "/, mm., '7, mm. longe mucronata, glabrescentia, dis- 

 tantia, s:epe in summo cauli tantum conservata. Racemi terminales vel axillares 



