52 ARCHEGONIATAE 



in an archegonium, a flask-shaped organ with neck of one layer of cells 

 thick ; includes Bryo- and Pteridophyta. 

 Archegonium, see last, and Filicineae, &c. 

 Archeria Hook. f. Epacridaceae (2). 5 Tasmania, N.Z. 

 Archesporium, Pteridophyta. 



Archibaccharis Heering. Compositae (3). 2 Mex. 

 Archichlamydeae. A division of Dicots. (cf. classification at end). 

 Archidendron F. Muell. Leguminosae (i. i). 10 trop. Austr., New 



Guin. 

 Archiphyllum Van Tiegh. (Myzodendron p.p. EP.}. Santal. 3 temp. 



S. Am. 



Archontophoenix H. Wendl. et Drude. Palmae (iv. i). 3 E. Austr. 

 Archytaea Mart. Theaceae. 3 Brazil, Guiana, Malay Arch. 

 Arctagrostis Griseb. Gramineae (8) 2 arctic. 

 ArcterantMs Greene (Oxygraphis p.p. EP. ; Ranunculus p.p. BH.}. 



Ranunculaceae (3). i N. Am. 

 Arcterica Coville (Cassiope p.p. EP.; Andromeda p.p. BH.}. Ericac. 



(n. i). i Behring Str. 



Arctic plants, cf. Zones of Veg. ; zone, above cult, limit. 

 Arctium L. Compositae (u). 4 palaeotemp. A. Lappa L. (burdock) 

 Brit. The invol. br. become hooked and woody after the fl. wither, 

 and by clinging to fur &c. aid in jerking out the fr. 

 Arctocrania Nakai (Cornus p.p.)- Cornaceae. 2 N. temp. 

 Arctomecon Torr. et Frem. Papaveraceae (11). 3 Calif. 

 Arctophila Rupr. = Poa L. and Colpodium Trin. (Gramin.). 

 Arctopus L. Umbelliferae (n. 2). 3 S. Afr. 



Arctostaphylos Adans. Ericaceae (n. 3). 30 N. temp, and arctic; 

 2 Brit, (bearberry) ; the fl. appear as soon as the snow melts. A. pun- 

 gens H.B. et K. (manzanita, Calif ), orn. wood. 



Arctotheca Wendl. (Arctotis p.p. EP.}. Compositae (10). i S. Afr. 

 Arctotis L. Compositae (10). 65 trop. and S. Afr., Austr. Shows 



chars, of 10 well. 



Arctous Niedz. (Arctostaphylos p.p.). Eric. (n. 3). i N. circumpolar. 

 Arcuate, bow-like. 



Arcynospermum Turcz. Malvaceae (inc. sed.). i Mex. 

 Arcythophyllum Willd. (Mallostoma BU.). Rubi. (i. 2). 15 trop. 



Am. Mts. 



Ardisia Sw. Myrsinaceae (n). 260 warm countries. Fl. usu. ? . 

 Ardisiandra Hook. f. Primulaceae. i W. trop. Afr. Mts. 

 Arduina Mill. (Carissa L.). Apocynaceae (i. i). 20 palaeotrop. 

 Areca L. Palmae (iv). 15 Indomal. A. Catechu L. largely cult, in 

 trop. As. for its seeds (Areca or Betel nuts). The infl. is below the 

 oldest living 1., monoec., with the ? fls. at the bases of the twigs, the 

 cf above. The seed, about as big as a damson, is cut into slices and 

 rolled up in a leaf of Betel pepper (Piper Betle} with a little lime. 

 When chewed, it turns the saliva bright red ; it acts as a stimulus 

 upon the digestive organs, and is supposed by the natives (who use 

 it habitually) to be a preventive of dysentery. A. oleracea Jacq. = 

 Oreodoxa o. 



Areca-nut, Areca Catechu L. 

 Arechavaletaia Spegazz. Flacourt. (7) (Samyd. BH.}. \ Uruguay. 



