410 PROCEEDINGS OF THE AMERICAN ACADEMY. 



patenteque pubescentibus plus minusve rubescentibus fere filiformibus 

 sed basim versus induratis et lignescentibus, nodis hirsutulis ; foliis 

 anguste linearibus subfiliformibus 1-nerviis glabris margine revolutis 

 apice acutissimis 1-2 cm. longis ; vaginis brevissimis pauci- (saepius 

 2-) setis ; verticillis remotis plerumque 2 subglobosis ca. 1 cm. dia- 

 metro; catyce longe 2-lobato, lobis lanceolato-linearibus acutissimis 

 herbaceis sursum fimbriato-ciliatis, dentibus intermediis multo brevi- 

 oribus scariosis ; corolla alba hypocrateriinorpha 4-loba 2.5 mm. longa, 

 lobis ovato-oblongis apicem versus hispidis, tubo intus basim versus 

 pubescente ; staminibus 4 in summa parte tubi affixis, leviter exsertis ; 

 fructu et seminibus non visis. — British Honduras, on dry sandy- 

 pine ridges, 23 October, 1905, Prof. Morton E. Peck, no. 180 (type, 

 in Gray Herb.). From its 2-lobed calyx this species would seem to 

 stand near the polymorphous B. verticillata (HBK.) Cham. & Schlecht. 

 but with all due recognition of the extraordinary variability of that 

 species, it does not seem possible that this delicate filiform plant 

 should be included among its forms. Among the distinctions noted 

 is the form of the stigma, which in B. verticillata is barely lobed, but 

 in B. Peckiana distinctly bifid with short but actually filiform lobes. 



Borreria verticillata (L.) G. F. W. Mey., var. thymiformis, n. 

 var., pumila 6-8 cm. alta subglabra; caulibus multis gracilibus laxis 

 fiexuosis a caudice crassa nigrescente oriuntibus ; foliis ovato-ellipticis 

 7-11 mm. longis 2-5 mm. latis; capitibus parvis ca. 8 mm. diametro 

 terminalibus. — Mexico : about 29 km. southwest of the city of 

 Oaxaca, alt. 2300-2900 m., 10-20 September, 1894, K W. Nelson, 

 no. 1410 (type, in Gray Herb, and Herb. U. S. Nat. Mus.). This 

 plant, although maintaining all the floral traits of the species, is so 

 strikingly different from the usual forms as to be well worthy of varietal 

 distinction. Were it not connected with the more typical forms by 

 such intermediates as L. C. Smith's no. 40 from the Cuilapan Moun- 

 tains, it could certainly pass as a distinct species. 



Erigeron Deamii, n. sp., suffruticulus gracillimus pumilus 1 dm. 

 altus irregulariter a basi ramosus, ramis teretibus strigosis foliosissimis 

 ascendentibus saepius 1-capitatis ; foliis linearibus (infimis anguste 

 oblanceolatis) ca. 1 cm. longis ca. 1 mm. latis utrinque strigilloso- 

 hispidulis 1-nerviis saepe in axillis proliferis ; pedunculis filiformibus 

 ca. 3 cm. longis rectis vel apicem versus plus minusve nutantibus 

 1-capitatis subappresse pubescentibus ; capitibus hemisphaericis ca. 

 8 mm. diametro ; involucri squamis argute linearibus attenuatis sub- 

 aequalibus media parte viridibus hirsutulis margine pallidis scariosis 

 ca. 4 mm. longis ; fiosculis disci numerosis, corollis 2.3 mm. longis 

 apicem versus flavidulis, achaeniis compressis sparse hirsutulis 1.3 mm. 



