114 FLOKA OF TASMANIA. [Rosacea. 
1. Geum urbanum (Liun. Sp. PL 716), var. strictum; pubescenti-pilosum v. villosum, caule erecto 
stricto dichotome-ramoso folioso multifloro, foliis radicalibus interrupte piunatisectis, foliolis rhouibeo-cunei- 
formibus inciso-lobatis duplicato-serratis terminali majore, pedunculis villosis, calycibus pubescenti-pilosis, 
petalis flavis, capitulo acheniorum oblongo v. globoso, acheniis compressis villosis, stylis deflexis apices 
versus geniculars.— G. strictum, Ait. Hort. Kew. i. 207. G. Magellanicutn, Commerson, ex Pers. Ench. 
ii. 57 j Be Cand. Prodr. ii. 554 ; Fl. K Zeal. i. 55, ii. 327 ; Fl. Ant. ii. 262. G. ranunculoides, Ser. in 
Mem. Soc. Phys. Gen. ii. 138; Be Cand. Prodr. i. 551. G. Australia?, Ferd. Mueller. {Gunn, 249.) 
Hab. Not uncommon in shady places in various parts of the Colony, Gunn. — (FL Dec.) (v. v.) 
Distrib. South-eastern Australia (Victoria, Mueller), New Zealand, and South Chili and Euegia, 
Canada and the Northern United States, temperate Europe and Asia. 
In the Supplement to the 'New Zealand Flora,' ii. 328, I have alluded to Asa Gray's remarks on this plant, 
which he has published in the 'Botany of the United States' Exploring Expedition' (i. 501); he there observes 
that I should have adopted in the ' New Zealand Flora' the name of strictum in preference to that of Magellanicum, 
and tliis I should have done here, were it not that a full reconsideration of the subject confirms my original impres- 
sion that it is the G. urbanum of Europe. I have quoted under the species only those synonyms of whose identi- 
fication I am most sure: in the 'New Zealand Flora' I have added to the list G. CMloense, Chilense, Quellyon, 
and intermedium, a re-union in which Asa Gray agrees. — The Tasmanian plant forms a rigid, strict, erect, 
branching-, leafy, hairy, silky, or villous herb, 2-3 feet high, with many rather small yellow flowers. Leaves pinna- 
tisect ; leaflets two or four pair, extremely variable in size and shape, more or less lobed, cut, and inciso-serrate, 
those of the cauline leaves often lacerate. Heads of achenia globose or oblong, villous. Styles of the fruit de- 
flexed, abruptly bent and twisted once towards the apex, which is nearly smooth : the portion of the style beyond 
the twist is often broken off when the style appears hooked at the apex. 
Gen. IV. ACtENA, Vald. 
Calyeis tubus oblongus, compressus v. angulatus, angulis ssepissime in aristas simplices v. glochidiatas 
post anthesin excurrentibus ; fauce constricta. Petala 2-5 v. 0, libera v. basi coalita, ore calyeis inserta. 
Stamina 2-5. Ovaria 1-2, .calyce inclusa, 1-ovulata; stylo terminali; stigmate plumoso. Achenia 1-2, 
calyce indurato tecta ; pericarpio coriaceo v. membranaceo. 
This very remarkable genus is almost exclusively confined to the temperate and colder regions of the Southern 
Hemisphere, a few species advancing in South America northwards along the Andes into the Tropics. The two 
Tasmanian species are both Australian, and none other have been defected in that continent. They are common in 
some pastures, where the hooked bristles of the calyces often cause great annoyance to sheep, whose wool becomes 
covered with " bui ulty freed from them. — 11 rhizomes, very short branches, 
pinnated leaves, and terminal scapes; inflorescence usually capitab . minute. C'aJy.r-Uiht' oblong, 
unarmed or covered with hooked bristles, often quadrangular, the angles, after flowering, elongating into sharp spines, 
that are in some species tipped with recurvi <i bristles. Petals minute, four or five, or none. Stamens one to four. 
Achenia hidden in the tube of the calyx ; the style and plumose sticjmata exserted. (Named from ctKcuva, a spine; 
in allusion to the spinous calyces.) 
1. Acaena Sanguisorbae (Vahl, Enum. i. 294) ; sericeo-pilosa v. glabrata, foliolis 4-10-jugis ovatis 
oblongis rotundatisve inciso-serratis, capitulis globosis, calyeis tubo tetragono fructifero 4-aristato, aristis 
apice glochidiatis, petala basi cohaerentia, staminibus 2, stigmate dilatato fimbriate — Be Cand. Prodr. ii. 
592 ; Fl. Ant. i. 9 ; Fl. N. Zeal. i. 54. Ancistrum Sanguisorba3, Linn. JU. Suppl. p. 189. A. diandrum, 
Forst. Prodr. n. 52. A. anserinsefolium, Forst. Gen. t. 2. A. decumbens, Gartn. Fruct. t. 32. {Gunn, 
483.) 
