90 DR. F. Mueller's monograph 



18. Eucalyptus tbachyphloia. Arborea, ramulis angulatis, foliis 

 alternis modice petiolatis angusto-lanceolatis subfalcatis in acumen 

 tenue angustatis opacis subtilissime venosis pellucide punctatis, vena 

 longitudinal! margin! subcontigua, urabellis panieulatis 3-5-floris, 

 pedicellis peduneulo brevioribus fmetu sequilongis angulatis, fructibus 

 parvis eeostatis truncato-ovatis 3-loculatis, valvis deltoideis profunde 

 inclusis, seminibus apteris. 



Hab. In collibus ad flumen Burnett. Anth. Sept., Oct. 



Arbor mediocris, cortice in trunco ramisque persistente cinereo-fusco 

 frustuloso rugoso. Folia 3-5" longa, 6-8'" lata, in petiolum 6-9"' 

 longum paulo angustata, subtus parum pallidiora. Fructus circiter 3'" 

 metientes apice sensim contract!. 



19. Eucalyptus bicolor {A. Cunn. in Mitchell^ Trop. Austr. p. 390. 

 E. parviflora, Muell. MSS.). Fruticosa vel arborea, ramulis teretius- 

 culis, foliis alternis lanceolato-linearibus v. lanceolatis leniter curvatis 

 vel falcatis sensim acutatis subtiliter penniveniis nitidulis pellucide 

 punctatis, vena peripherica a margine parum remota, umbellis axilla- 

 ribus terminalibusque solitariis v. panieulatis 5-7-floris, pedunculis 

 partialibus petiolo vix sequilongis, pedicellis calycis tubo semiovato 

 ecostato sequilongis vel brevioribus, operculo hemisphaerico v. semi- 

 ovato mutico tubo perparum breviore, capsulis minutis semiovatis 

 obscure bicostatis apice vix contractis 3-4-loculatis vertice planius- 

 culis, valvis infra marginem insertis inclusis, seminibus apteris. 



Hab. In planitiebus collibusque sterilibus a sinu Carpentaria usque ad 

 regiones orientales Australise extratropicas. Anth. autumno. 



Frutex vel arbor minor, cortice sordide cano rugoso in trunco ramisque 

 vestitus. Folia petiolo semuncial! vel paulo longiore praedita, ut- 

 plurimum 2|— 4|^" longa, 3-6 lineas lata bas! acuta. Calycis tubus 

 sesquilinearis. Filamenta alba ad \^" longa. Antherce subglobosae. 

 Stylus staminibus paulo brevior. Stigma hemispliEericum. Capsula 

 2-2|^"' metiens. Semina fertilia i-f" longa nigrescentia angulato- 

 ovata subtilissime rugulosa. 



" Scrub Box-tree " peregrinatorum, locos minus fertiles quam E. micro- 

 theca occupans, absque foliis nitentibus et ramis omnino corticatis 

 jam ex longinquo distinguenda. Arctius ad E. populneam approxi- 

 mat. Anth. autumno. 



Huic quoque E. gracilis et E. Hookeri {E. viminalis, Hook, in Mitch. 

 Trop. Austr., non Labill.) affines*. 



20. Eucalyptus ptychocarpa. Arborea, ramulis angulatis, foliis 

 magnis crassis alternis oblique lanceolatis tenui-acuminatis modice 



* Major Mitchell's specimens have black bark, and rather large pedicelled 

 flowers. Mueller's, from Burdekin River, have also black bark and small sessile 

 flowers ; those from Carpentaria have pale yellow bark, very narrow leaves, and 

 pedicelled capsules. — (A. B.) 



