72 ON THE CLASSIFICATION OF MONOCOTYLEDONS. 
under surface . its fronds and involucre regularly cup-shaped, like 
that of C. 
Pumesonrois:( « upelypodiom) comorENsE, Baker, n.sp.—Caudex bre- 
viter repens, paleis parvis lanceolatis castaneis dense vestitus. Stipites 
erecti Sabouepiten —. erecti 2-5 poll. ~—— pilis patulis brunneis 
mollibus cillimis 1 lin. longis dense vestiti — anceolata 
——_ pinnata viridia vaio modice firma 6-12 poll. longa medio 
2 poll. lata. Pinnw 20-40-juge lanceolate conferte basi late 
inferiores paullo minores. Venul pinnarum erecto-patentes furcate. 
Sori ad pinnam 8-12-juge globosi, superficiales inter costam et mar- 
ginem mediale . 
- Hab. i insulam J ohanna, alt. 3000-5000 pedes, ad arbores. 
0. 1788 
Near P pendulum, Sw., and P. suspensum, Limn., of Tropical 
- America. 
EXPLANATION oF Tas. 185. 
Fig. 1. Boswellia neglecta.—A branch with leaves and flowers.—a, flower 
5. section of the same; c,. a stamen m (all magnified) ; a section of bark and part 
of wood (Hartnack no. 8 objective, 2 i bree here s is the false suberous zon 
b. bark; c. cambium ; w. ultimate wood-zone, and W. Spiadllinaee tithe gre 3 
in the bark a! to a® are the air-canals ; a+ is a supposed rudimentary air-canal ; 
Z to & mark the five liber-zones, and at 0 ry liber-cell. 
Fig. 2. Grewia ectasicarpa,—Fruit (nat. 
Fig. 3. Tinnea heterotypica. thd “ad a of sar and stigma (magnified). 
Fig ‘ocoma somalensis.—Ovary, &c.. (magnified), 
e5 
‘ON THE CLASSIFICATION OF MONOCOTYLEDON S: A 
HISTORICAL CRITICISM. 
By G. 8S. Bourerr. 
ernie, Perigyai ia, an ia, arbor to the inse 
floral w: Thi Preriiie with the Perigynia apes in the - 
isthe basis of that adopted by Dr. Hooker in the Appendix to 
‘divided them into Petaloidew and Glumacee, according to the nature 
of the perianth ; ¢ in 1843 } Brongniart grouped them as albuminous and 
ous, soto in the latter the Orchidee and Fluviales, and 
further dividing the former into three groups according to the nature 
- of the “ altuna and perianth.§ In the scheme first propounded in 
aquatic and exalbuminous, 
Plantarum secundum Ordines Naturales disposita.”” 
= SA General Beer of St tl 1873. 
** Introduction to atural Orders of Plants.’’ 
; “* Enumération dee Genres ds Pacinn ace , suivent get anne dans 
1 Ecole de Botanique.”’ qr 
