COHORTS AND ORDERS. (BY THE EDITOR.) 



1017 



CLASS II. MONOCOTYLEDONS. 



Stem without distinct layers of wood surrounding a column of pith, or a separable 

 bark. Leaves with usually parallel venation. Floral whorls when present usually in threes 

 or multiples of three. Embryo with one cotyledon. In germination adventitious roots 

 usually at once proceed from the radicular end of the embryo. (Obscure rings of wood 

 and a bark are distinguishable in some arborescent AsparagL Net-veined leaves occur 

 in Dioscorece, Smilacece, and a few other Orders.) 



DIVISION I. 



Ovary inferior (superior in some Bromeliacece and Hcemodoracece) . Perianth usually 

 distinct, 2- seriate and coloured. 



\X * Albumen ; embryo distinct. 



Cohort I. Hydrales. Flowers usually diclinous, regular. Perianth 6-partite, 3 outer 

 segments herbaceous, 3 inner petaloid or 0. Stamens 3 or more, epigynons or inserted on 

 the base of the perianth-segments. Ovary 1, 3, or 6-celled. Fruit a berry. Embryo 

 distinct, exalbuminous. Aquatic herbs. 



1. HYDROCHARIDE^; 754 



* * Albumen floury, embryo distinct. 



Cohort II. Amomales. Flowers usually $ an( l "very irregular (regular in Brorne- 

 liacece). Perianth of 5-6 segments. Stamens 6, 1 or 5 antheriferous, the rest petaloid, all 

 antheriferous in Bromeliacece. Ovary usually 3-celled. Fruit a berry or capsule. 



2. CANNACEJS. Flowers $ , irregular. 

 Perianth 6-partite, 3 outer segments herba- 

 ceous, regular; inner petaloid, irregular. 

 Stamen 1, lateral ; anther 1-celled . . 757 



3. ZINGIBERACE^;. Flowers $ , irregular. 

 Perianth of Cannacca. Stamen 1, anterior; 

 anther 2-celled . 760 



PAGE 



4. MusACE^i. Flowers irregular, unisexual. 

 Perianth 6-partite. Stamens 6, or 5 and a 

 staminode ; anthers 2-celled . . . 762 



5. BROMELIACEJE. Flowers $ , regular or 

 nearly so. Perianth (sometimes superior) 

 6-partite ; 3 outer segments herbaceous, 3 

 inner petaloid. Stamens 6, all perfect . 766 



* * * Albumen or cellular ; embryo ve>y obscure. Seeds very minute (except Taccaceea). 



Cohort III. OrcMdales. Flowers $ ail( i very irregular. Perianth of 6 rarely 

 3 segments. Stamens 1, 2, or 3, confluent with the style. Fruit capsular. Embryo very 

 minute. 



6. ORCHIDEJE. Perianth very irregular. 

 Stamens 1 or 2, confluent with the style and 

 stigma. Ovary 1-celled, rarely 3-celled . 769 



7. A POSIA STAGED. Perianth sub-regular. 

 Stamens 2 or 3, adnate to the base of the 

 style. Ovary 3-celled .... 777 



Stamens 3 or 6, 

 Fruit capsular or 



Cohort IV. Taccades. Flowers , regular. Perianth 6-lobed. 

 inserted on the perianth-tube ; anthers peculiar. Ovary 1- or 3-celled, 

 berried. Seeds minute, exalbuminous, or larger and albuminous. 



8. BUEMANNIACE^:. Leaves 0, or narrow 9. TACCACE.E. Leaves broad, with a mid- 



with parallel venation, or broader and net- 

 veined. Seeds minute ; embryo obscure . 777 



9. TAOCACXJB. 



rib and parallel diverging veins, 

 minous ; embryo minute 



Seed albu- 



780 



