606 PROCEEDINGS OF THE AMERICAN ACADEMY. 



brevibus stigma superantibus ; stylo brevi recto ; stigmate bilamellato, 

 partibus obovatis 1 mm. longis 0.5 mm. latis ; capsulis calycem super- 

 antibus oblongo-ellipticis ad basim dehiscentibus cum duabus valvulis 

 divergentibus ; placentis paulo intrusis muricatis ; seminibus numerosis 

 brunneis suborbiculatis minute papillosis vel irregulariter et interrupte 

 corrugatis. — Michoacan : Morelia, on a bare damp mesa, 29 November, 

 1907, C. G. Pringle, no. 10,408 (type, in hb. Gray). This tiny plant 

 seems nearest to Centaurium tetramerum (Schiede), n. comb. 

 {Erythraea tetramera Schiede ex Schl. in Bot. Zeit. xiii 920), and re- 

 sembles that species in its 4-merous flowers and dehiscent fruit. It 

 differs, however, in the short corolla-tube not exceeding the calyx, the 

 leaves with scarcely perceptible nerves, the fasciculate flowering stems, 

 the persistent basal leaves, the striate peduncles, and the bilamellate 

 stigma. The color of the flowers is not readily discernible in the dried 

 specimens, but the lower part of the limb of the corolla appears to be 

 yellow and the tips of the lobes tinged with pink. 



Spigelia quaternata, n. sp., radicibus fasciculatis ; caulibus multis 

 ex caudice br^ve, 3 dm. altis purpureis minute scabridis, parte supe- 

 riore angulatis ; foliis saepissime quaternatis supremis oppositis ovato- 

 oblongis apice acuminatis 4-8 cm. longis 1-3 cm. latis integris superne 

 glabris vel scabridulis subter pallidioribus et glabris, nerviis primariis 

 et secondariis hispido-scabridis ; stipulis brevibus triangularibus basi 

 semi-amplexicaulibus folia conjungentibus ; tot ramulis quot foliis ad 

 nodos, terminantibus in spicis gracilibus ; floribus flavis sessilibus secun- 

 dis, in alabastro confertis, in fructu 3-6 mm. distantibus ; sepalis lineari- 

 lanceolatis acuminatis 4 mm. longis 1 mm. latis cum duabus glandibus 

 interioribus ; corollae tubo 8 mm. longo, laciniis oblongis acutis 3 mm. 

 longis, superiore paulo longiore ; capsulae basi persistente ; seminibus 

 globosis punctatis. — San Luis Potosi : Rascon, Dr. Edward Palmer, 

 19-22 June, 1905, no. 671 (type, in hb. Gray). This species is most 

 closely related to 8. Humboldt tana Cham. & Schlecht. and is easily 

 distinguished by its much smaller flowers and its scabrid and more 

 or less hispid pubescence. 



Bourreria obovata, n. sp., ramulis senioribus minute albo-punc- 

 tatis, junioribus canescentibus cum pilis brevibus adpressis ; foliis 

 obovatis superne scabridulis cum pilis brevibus adpressis basi minute 

 pustulatis subter pallidioribus non scabridis, apice truncatis obtusis vel 

 retusis, basi ad petiolum brevem attenuatis ; pedunculis terminalibus 

 cymosis cum pedicellis brevibus ; bracteis foliaceis ; calyce fere ad 

 mediam partem 5-dentato, dentibus triangularibus acutis 4 mm. longis, 

 utrinque adpresso-pilosellis ; corolla rotata, tubo calycem aequanti, 

 lobis 5-6 rotundatis, 5 mm. longis, basi auriculatis ; staminibus 5-6, 



