Crassulacea?.] FLORA OF TASMANIA. 145 
Nat. Ord. XXXIV. CRASSULACE^. 
The number (8 or 10) of Australian Crassulacea is much ll r ilian J t have lu - 
sidering how analogous the climate and soil of many parts of that continent arc to those of South Africa, 
where they abound. The absence of any succulent vegetation [Aloe, Euphorbia, 8tapeiui, Cactus, Mesem- 
bryaiitJtetdum, and Crassula) in the desert of Australia is a very remarkable feature, and in this respect it 
contrasts with other dry climates. What Crassulacece there arc, almost all belong to the widely diifused 
genus Tillcea, which is also European. 
Gen. I. TILL.EA, Mich. 
Sepala, jpetala, et stamina 3-5. Squama ad basin carpellorum 3-5 v. 0. Ovaria 3-5 ; sty lis brevi- 
bus, recurvis ; ovulis plurimis. Carpella 3-5, membranacea, intus dehiscentia. Semi mi pauca v. numerosa. 
— Kevhse pusilla j foliis ojjjmitk, be n't <■■>, /,/<//;*, i,<Uy:rri,. '■ v ; tloribus jiarris, axillaribus. 
There are probably five or six species of this genus in Australia, hut they have not hirn closely examined: 
some are very similar to South African and South American ones. I ha\c considered die species of Hull'tarda as 
members of the genus, differing only in the presence of stipitate glands, of very variahle size, at the bases of the 
ovaries. — Small generally minute, succulent, opposite-leaved plants, with axillary, solitary or fascicled, inconspi- 
many seeds. (Named in honour of Micfmel .Liyrlo Tilii. a hotanist of Pisa.) 
1. Tillasa verticillaris (DC. Prodr. iii. 382); caulc erecto simplici v. e ba.si ramosissnno, foliis 
lineari-oblongis basi connatis, floribus 4-meris dense congest [a plerisqUG seaailibus scd [laucis in quovis 
fasciculo pedicel! it i-. - palis j.t lisijiu subulato-aeuiniiiati-, squamis hypogynis U, carpellis 1-2-spennis.— 
Fl. N. Zeal. i. 75 (non Hook. Ic. PI. t. 295). {Gmm, 91.) 
Hab. Common on dry rocks and gravel in many parts of the Colony.— (Fl. Oct.-Feb.) {v. v.) 
Distrib. Extratropical Australia, New Zealand, South Africa. 
An erect, succulent herb, 2-6 inches high, generally growing in small tufts. Leaves linear-oblong, blunt, 1-2 
lines long. Mowers densely crowded, very minute, most of them sessile, a few pedicelled ones project beyond the 
rest. Sepals four, ovate, subulate, acuminate. Eypogynous scales 0. Carpels one- or few-seeded.— This ap- 
proaches very closely to the European T. muscosa, but is larger, has larger and tetramerous flowers, and narrower 
2. Tillsea purpurata (Nob. in Lond. Journ. Bot. vi. 472) ; perpusilla, caulibus e basi decumbente 
ramosa erectis prostratisve, foliis oppositis basi connatis linearibus, floribus pedicellatis 4-meris, sepalis 
ovatis obtusis v. subacutis, petalis parvis acuminatis, squamis hypogynis 0, carpellis 4 magnis obtusis apice 
hiante bilobo, seminibus numerosis.— M. N. Zeal. i. 74. {Gunn, 1967.) 
Hab. Wet places, Formosa, Gunn.— (EL Nov.) 
Distrib. South-eastern and South-western Australia; New Zealand. 
•dlv 1 inch hiffh, hut with the branches 
te, slender-stem 
med, decumbent, red-pi; 
upie 
y fruit.— Leaves 
minute, lii 
lear. Flowers 
Oil 
nietimes short. 
Floicers 
larger in ptOf 
iorti. 
four, nearly equ; 
d in size. 
Hyptjj o 
seal 
3. Tillaea macrantha (Nob. in Hook. Ic. PL t. 310) ; pusilla, caulibus brevibus dichotome ramosis 
erectis, foliis ovatis brevibus, floribus gracile pedicellatis pro planta magnis tctrameris, sepalis oblongis acutis 
ciliolatis, petalis ovatis subacutis carpellisque lineari-oblongis sepalis requilongts. (Gunn, 1117.) 
