DAVID LYALL, M.D. 



209 



Floribus luteis 2. A. mexicana. 



[Stylo subniillo. Var. tijpica { = A. mexi- 

 cana L.). 

 Stylo distincto. Var. ochruleuca [= A. 

 ochroleuca Sweet).] 

 Floribus albis : — 



Bracteis secus ramos florales dispositis : — 

 Capsula valvis teneribus aculeata, se- 



palorum cornubus miuoribus . . 3. A. alba. 

 [Foliis floribusque miuoribus aculeis 

 asceudenti-patentibus. Var. tijpica 

 {—A. alba Lestib.) 

 Foliis floribusque majoribus aculeis 

 reflexo-pateutibus. Var. (jlauca 

 (= A. iilauca Nutt.).] 

 Capsula valvis crasse coriaceis vix ar- 



mata, sepalorum cornubus elongatis 4. A. geandiflora. 

 Bracteis sub floras aggregatis : — 



Capsula valvis teueribus sparse aculeata, 



sepalorum cornubus extus lievibus 5. A. intermedia. 

 [Eamis floralibus elongatis, sepalorum 

 cornubus pyramidalibus. Var. tij- 

 jiica [= A. intermedia Sweet). 

 Kamis floralibus perbrevibus, sepa- 

 lorum cornubus teretiformibus. 

 Var. stenopetala (=^. stenopetala).] 

 Capsula valvis crassis densissime acu- 

 leatis, sepalorum cornubus extus 



aculeatis 6. A. platyceras. 



[Alabastris globosis : — 

 Foliis cauleque aculeatissimis sed 

 glabris, petalis apice truncatis. 

 Var. ti/pica {= A. platyceras 

 L. & 0."). 

 Foliis cauleque bispidis, petalis 

 apice rotundatis. Var. hispida 

 (=A. hispida Gray). 

 Alabastris oblongis. Var. chilensis 

 (= ^. rosea Hook.).] 



(To be continued.) 



DAVID LYALL, M.D. 



David Lyall was born at Auchinblae in Kincardineshire, June 

 1st, 1817, and after a long period of active service as a medical 

 officer and naturalist in the Royal Navy, he retired in 1873, and 

 died at Cheltenham, March 2nd, 1895, with the rank of Deputy 

 Inspector-General of Hospitals and Fleets and a Good- Service 



Journal of Botany. — Vol. 33. [July, 1895.] p 



