ASCLEPIADACEAE 57 



Artrolobium Desv. = CoronilIa L., Ornithopus L., &c. (Legum.). 



Arum (Tourn.) Linn. Araceae (vn). 15 Eur., Medit. A.maculatum'L. 

 (cuckoo-pint, wake-robin, lords and ladies, Brit.) is a perenn. tuberous 

 pi. with monoec. fls. ; V fls. at base of spadix (each of i cpl., naked) 

 and S above (each of 2 4 sta.), and above these again rudimentary 

 cf fls. repres. by hairs which project and close the mouth of the spathe. 

 The foetid smell attracts flies, which enter the spathe, find the stigmas 

 ripe, and are kept prisoners till the pollen is shed ; then the hairs 

 wither and escape is possible (cf. Aristolochia). Fr. a berry. The 

 starch of the tubers was formerly used as food under the name Port- 

 land arrowroot, but it is difficult to get rid of the poisonous juices 

 accompanying it. Other sp. are similarly used in Eur. 



Arum lily, Richardia africana Kunth. 



Aruncus Aclans. Rosaceae (I. i). 6 N. temp. 



Arundina Blume. Orchidaceae (n. 4). 8 S.E. As., Malay Arch. 



Arundinaceous, reed-like. 



Arundinaria Michx. Gramineae (13). 45 As., Am. Bamboos (g-v-)- 



Arundinella Raddi. Gramineae (4). 45 trop. 



Arundo Tourn. Gramineae (10). 12 trop. and temp. A. Phragmites 

 L. (Brit.) = P. communis. The stems of A. Donax L. are used for 

 sticks, fishing-rods, &c. 



Arvensis (Lat.), of arable land. 



Arytera Blume (Ratonia DC. p.p. BH.}. Sapind. (i). 20 E. As., 

 Austr. 



Asaemia Harv. Compositae (7). i S. Afr. 



Asafoetida, Ferula Narthex Boiss., F. Assafoetida L., &c. 



Asagraea Baill. (Dalea L. p p. BH. ). Leguminosae (ill. 6). 2 N. Am. 



Asarabacca, Asarum europaeum L. 



Asarca Poepp. ex Lindl. = Chloraea Lindl. (Orchid.). 



Asarum (Tourn.) L. Aristolochiaceae. 30 N. temp. A. europaeum L. 

 (asarabacca), an escape in Brit, (formerly medic.). Rhiz. below 

 ground and creeping shoots above ; the latter are sympodial, each 

 annual joint bearing several scale 1. below, then two green 1. and 

 a terminal fl. Fl. reg. ; P (3), sometimes with 3 small teeth between 

 the segments (perhaps remnants of a former inner whorl); A 12; 

 G (6). The dark-brown, resinously scented fl. is visited by flies, 

 and is very protog. ; when the stigmas are ripe the sta. are all bent 

 away, but later on they move up to the centre and dehisce extr. The 

 P lobes are bent in at first towards the centre of the fl. and form a 

 sort of prison of it, but afterwards gradually straighten. 



Ascarina Forst. Chloranthaceae. 6 Polynesia. 



Ascending (aestivation), cf. Aest. ; (ovule), sloping upwards ; (stem), do. 



-ascens (Lat. suffix), tending towards. 



Aschamia Salisb. = Hippeastrum Herb. p.p. (Amaryllid.). 



Aschenbornia Schauer. Compositae (2). i Mex. 



Aschersoniodoxa Gilg-et Muschler (Draba p.p.). Cruc. (4). i Ecuador. 



Asciadium Griseb. Umbelliferae (inc. sed.). i Cuba. 



Ascidium, a pitcher. 



Asclepiadaceae (EP. BH.}. Dicots. (Sympet. Contortae). 220 gen., 

 1700 sp., mostly trop. (esp. Afr.), but a few temp. In veg. habit 

 like Apocynaceae ; some perenn. herbs, but most are climbing shrubs 



