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ENGLER'S SYSTEM 
with large ovules; seeds usually with arils and with endo- and peri- 
sperm; tropical plants): 
N. O. 43. Musaceae. 44. Zingiberaceae. 45. Cannaceae. 
46. Marantaceae. 
Cohort 11. Microspermae (fir. cyclic, homo- or hetero-chlam., 
3-merous, typically diplostemonous, but often with important reduction ; 
ovary inferior, 3- or i-loc. with 00 small ovules; endosperm or none): 
N. O. 47. Burmanniaceae. 48. Orchidaceae. 
Class II. Dicotyledones (embryo with two cotyledons; stem with 
open vascular bundles usually in a single ring; leaf net-veined; fir. 
usually 5-, 4-, or 2-merous; see D. in Pt. II.): 
SERIES I. ARCHICHLAMYDEAE . Perianth in lower stages 
of development, i.e. either (1) absent, (2) simple, in one whorl, petaloid 
or sepaloid, (3) in two whorls, the inner polyphyllous, (4) in two whorls, 
the inner gamophyllous (rare; in forms whose nearest relatives are 
polyphyllous, e.g. Correa in Rutaceae), or (5) in one whorl, in conse- 
quence of the abortion of the inner whorl (apetalous). 
Cohort 1. Verticillatae (firs, unisexual; <? in spikes, with 2 peri- 
anth-leaves and 1 sta. ; ? in heads, naked, of (2) cpls.; ovules 2, in 
anterior loc. only, orthotropous, basal ; nut enclosed in woody bracteole ; 
seed exalbuminous) : 
N. O. 49. Casuarinaceae. 
Cohort 2. Piperales (firs, very small, in spikes, naked or homochlam., 
$ or unisexual; sta. 1 — 10, cpls. 1 — 4, or (1 — 4); leaves simple with 
stipules or o): 
N. O. 50. Saururaceae. 51. Piperaceae. 52. Chloranthaceae. 
53. Lacistemaceae. 
Cohort 3. Salicales (fir. naked, dioecious, with cup-like disc, some- 
times reduced to tooth-like scales; sta. 2 — 00, cpls. (2); G i-loc. with 
00 anatropous ovules on parietal placentae ; capsule with 00 seeds ; seed 
small, exalbuminous, with basal tuft of hairs; woody plants with undi- 
vided, rarely lobed, alternate, stipulate leaves, and spikes of firs.): 
N. O. 54. Salicaceae. 
Cohort 4. Myricales (firs, naked, monoecious, $ with 2 — 16 sta., $ 
with (2) cpls.; G i-loc. with 1 basal orthotropous ovule; stigmas 2; 
herbs or undershrubs with usually simple leaves, and spikes of firs.): 
N. O. 55. Myricaceae. 
Cohort 5. Balanopsidales (firs, dioecious, c? monochlam., $ sur- 
rounded by 00 bracts; cpls. (2) each with 2 erect ovules; drupe; trees 
or shrubs, <? firs, in spikes, ? solitary) : 
N. O. 56. Balanopsidaceae. 
Cohort 6. Leitneriales (firs, dioecious, <? naked with 3—12 sta. ; ? 
with scaly perianth; cpl. 1 with long style and 1 ventral amphitropous 
ovule ; drupe ; endosperm thin ; shrubs with alt. leaves) : 
N. O. 57. Leitneriaceae. 
Cohort 7. Juglandales (fir. unisexual, naked or with sepaloid peri- 
anth ; sta. 3 — 40; cpls. (2); ovary i-loc. with 1 basal orthotropous 
ovule with 1 integument; drupe or nut; no stipules): 
N. O. 58. Juglandaceae. 
Cohort 8. Fagales (fir. cyclic, homochlam., rarely naked, generally 
