DICKSON I A. 



187 



linear pinnules (long and narrow leafits) cut quite clown to the stalk in the 

 lower part ; these have oblong-triangular, closely-set, sharp -pointed segments. 

 The fertile pinnules are slightly contracted, and the sori (spore masses), 

 covered with nearly orbicular involucres, are disposed two to six to each 

 fertile segment or lobe. — Hooker, Species Filicum, i., p. 67, t. 22b. Nicholson, 

 Dictionary of Gardening, i., p. 468. 



D. (Cibotium) speciosa — Cib-o'-tl-um ; spec-i-o'-sa (showy). A synonym 

 of D. chrysotricha. 



D. (Cibotium) spectabilis — Cib-o^-ti-um ,• spec-ta'-bil-is (showy). A 

 common garden name for D. Wendlandii. 



D. Spruceana— Spru-ce-a'-na (Spruce's). Synonymous with D. Sellowiana. 



D. (Eudicksonia) squarrosa — Eu-dick-so'-m-a ; squar-ro'-sa (rough- 

 stemmed), Swartz. 



A very handsome, arborescent, greenhouse species, native of ^^ew Zealand 

 and Chatham Island. It is particularly attractive on account of its slender, 

 black or very dark-coloured trunk, which frequently produces young plants 

 on its surface. The habit of its head is also peculiar and very effective : 

 it is quite tabulaaforme (fiat), and is formed of a quantity of rigid, leathery 

 fronds, dark shining green on their upper surface, paler beneath, and borne 

 on short and comparatively slender, dark purphsh or blackish stalks that are 

 covered with raised points and blackish hairs. These fronds are oblong- 

 triangular and tripinnate (three times divided to the midrib) ; their numerous 

 oblong-spear-shaped leaflets, 9in. to loin, long and 4in. to 6in. broad, are 

 furnished with nearly stalkless pinnules (leafits), which in their turn are 

 divided into spear-shaped segments, the barren ones toothed, the fertile ones 

 much smaller, deeply pinnatifid, and contracted. The sori (spore masses) are 

 disposed six to eight on the lower segments, the whole of which they occupy, 

 with the exception of the midrib and the tip. The trunk of this species, 

 being naturally of a very dry nature, must be carefully kept moht.— Hooker, 

 Species Filicum, p. 68. Nicholson, Dictionary of Gardening, i., p. 468. Lowe, 

 Ferns British and Exotic, viii., t. 44. 



D. Strigosa— strig-o'-sa (roughly hairy). Synonymous with D. scahra. 



