7'U I'LAXr lAl-K OK AI..\I!.\MA. 



Ai.akama: .Momiiaiii legiDU. ( iilliii;in ('t)iiiily, -iiowiiiti on gravelly borders of 

 lielils. Willi .S. tiiolirii, blooiiiinu iiixnit two moutlis earlier. May 1.'8, \S{)'>. 

 'l\ pf localitv as just givt-n. 

 lU-rh. Mohr.' 



Silphiiim asteriscus L. Sp. I'l. 2 : 1'L'O. 1753. Common Kusi.N\VKi-.n. 



Kll. Sk. 2 : lti!t. (irav, Man. od. (i, 270. Chap. Fl. 220. Grav, Svn. Fl. N. A. 1. pt. 

 2:211. 



Carolinian and Louisianian area.s. North Carolina to Florida and Louisiana. 



Alaha.ma: Over the State. Dry rocky or gravelly o])en woods and copses. Clay 

 County, Siiinliouo \'alley, l,0O0 feet altitude. Cullman County. Montgomery and 

 Moliile eoiinties. 



Type locality: '• llab. in Virginia. Carolina." 



Silphium asteriscus angustatum Gray, Syn. Fl. N. A. ed. 2. 1, )it. 2 : 440. IXiH]. 



Louisianiau area. Western Florida. 



Alabama: IMuc region, (irassy open ]iine woods. Baldwin and Mol;ile counties. 

 Flowers .luue, ,Fuly. Not fre(|uent. 



Tyj)c locality : •' Chattahooche, Florida, J. JI. Curtiss.'' 



Herb. Ceol. Surv. Herb. Mohr. 



Silphium deutatum Ell. Sk. 2 : 4(58. 1821-1824. 

 Si}2>hium asieriscus var. scahnnn Nutt. (ien. 2 : 183. 1818. 

 ^'. asteriscus laevicanle DC. Frodr. 5:512. 1836. 

 -S. astiviscus var. deniatum Chap. Fl. 221. 18H0. 

 Ell. Sk. 1. c. Gray, Syii. Fl. N. A. 1, pt. 2 : 241. Chap. Fl. cd. 3, 241. 



Ai.ahama: Mountain region to Central prairies. Kooky dry woods, open cojises. 

 Talladega County, Kiddell s Mill. Montgomery Couuty, bald rocky prairies, Pint- 

 lalla Creek. Wilcox County {Buckley). Lee County. Auburn {Baker <V' Karle, 283). 



In our specimens the stem is glabrous throughout, the leaves are ovate-lanceolate 

 acute, pilose, scabrous above, softer and paler nnderneath, thin; the lower opposite 

 on short hirsute itetioles, the upper sessile, alternate. Bracts of the involucre 

 snuiotli, eiliate, tht; inner broadly ovate; by this character the species becomes 

 widely remote from S. asterii^cus, w ith which it has by most botanists been connected. 



Type locality : " Grows in the western districts of Georgia." 



Herb. Geol. Surv. Herb. Mohr. 



Silphium trifoliatum L. Sp. PI. 2 : 020. 1753. Tiikek-lkaf Kt).siNwi:Ki>. 



Silphium ternifolium Michx. Kl. iior. Am. 2 : 146. 1803. 



Fll. Sk. 2 : 46t3. Grav. Man. ed. 6, 270. Chap. Fl. 220. Grav, Svn. Fl. N. A. 1, pt. 

 2: 241. 



Carolinian and Louisianian areas. Pennsylvania to ( )hio, south to Tennessee and 

 upper Georgia. 



Alabama: Mountain region to Central prairies. Margins of lields and rich open 

 copses. Clay Connty, Mount Olive. Cullman County. Montgomery County, Pint- 

 lalla Creek. Blount County, Blount Springs. Flowers, July, August; 5 to 6 feet 

 high. Not infrequent. 



Type locality : "Hab. in Virginia." 



Herli. Geol. Surv. Herli. Mohr. 



Silphium laevigatum Pursh, Fl. Am. Sept. 2 : 578. 1814. 

 Silphium trifoliatum latifolinm Gray, Syn. Fl. N. A. 1, pt. 2 : 241. 1884. 

 Ell. Sk. 2 : '465. Gray, Syn. Fl. 1. c. 

 Carolinian area. Lower South Carolinia and middle Georgia. 



Alabama: Mountain region. Open woods. Walker County, South Lowell. Blonnt 

 and Cullman counties. Lee Couuty, Auburn {Baker ij; Earle,28i). Flowers June to 

 August. Not rare. 



Considering that N. iutcrjrifolium is not found in the lower parts of the Southern 

 States, and that the description of Pursh is founded on Enslen's plant collected in 

 "Western (Tcorgia, there can be no doubt about its identity with the plant described 

 by Elliott under the same name; accordingly Pursh's name is to be kept up. 



In view of the many doubtful forms wliicli occur in the southern extension of the 

 Allegheny Mountains, and which have been either described as distinct species or 

 considered as varieties and often confounded with one another, it is not without 

 hesitation that the forms regarded as new by the writer are here introduced, espe- 

 cially when confronted by the confusion of the nomenclature of this group. 



Type locality : "In Georgia. Enslen." 



Herb. Geol. Surv. Herb. Mohr. 



