Urticaceae 37 



gined cup surrounding the gynaecium. Carpels 2. Styles 

 2. Ovule pendulous. Fruit a nut. Endosperm flesh)-. 

 Embryo curved. 



Stem twining. Leaves cordate, 3-7-lobed. Humulus. 



Stem erect. Leaves palmate. *Cannabis. 



Fam. 3. Urticaceae. Mostly herbs without latex, 

 Stingi?ig hairs o{\.QV\ present, /^/(^zc'^rj- diclinous. PeriantJi 

 of both sexes usually of four free tepals. Stamens as 

 many incurved in bud. Carpel i. Fruit a nut enclosed 

 by inner two or by all the tepals. Endosperm o. Embryo 

 straight. 



Tribe I. Urereae. Sti7iging haii's ^vtstwt. PeriantJi 

 of % flowers 4-partite. 



Only British genus (leaves opposite, stigma brush- 

 like) : Urtica. 



Tribe 2. Parietarieae. ^o stiiiging hairs. % perianth 

 (or involucre ?) tubular. 



Only British genus : Parietaria. 



b. Petaloideae (Moss). Flowers haplochlamy- 

 deous, perianth often petaloid. Diplochlamy- 

 deous flowers rare (Rumex). (For a see page 33, 

 for c see page 40.) 



Order 6. Santalales. Partial or entire parasites. 

 Leaves entire, exstipulate. Flowers cyclic, homochlamy- 

 deous with stamens opposite tepals. Carpels (2-3), 

 rarely (i). One ovule to each carpel, pendulous from 

 apex of loculus or from free central placenta, or placenta 

 and ovules not differentiated. One or no integuments. 



Suborder i. Santalineae. Ovules differentiated 

 from placenta, often without integument. 



