614 



Thallus undique aequalifcer coi'ticatus et gonidiophorus est, 

 sed uno latere, quo proferfc apothecia, albior est, altero, supe- 

 riore sterili et convexiore, inagis est albido-virens; totus dein 

 prima fronte evemiaceus aut fere roccellinus est, — Species se- 

 quens unica nota corticola viget in Madagascaria. 



804. PlmrocybeHildebrandtnM.iiU.Arg.., thallus albidus, dense 



caespitosus, 4—6 cm, longus; rami adscendentes, a basi pluries 



divergenter dichotome divisi, circ. l l / 2 mm. lati, ramuli ultimi 



2—4 acuti, supra flayescenti*albi, in pagina inferiore distinct© 



albiores et minus convexi, alii tamen omnino teretes, subtus 



praesertim in parte superiore fertiles, apices ipsi semper steriles; 



apothecia novella alba, clausa, pyriformi-globosa, apertal — Vj 3 



mm. lata, subtus laevia; sporae in. ascis linearibus octonae 



(valde juveniles tantum in ascis observatae fuerunt), regulariter 



globosae v. subangulosae, diametro 5 — 7 jjl aequantes, obscure 



viQlaceo-tinctae, — Ramulicola in Madagascaria centrali ad 

 Andrangolvaka: Hildebrandt. 



805. Vmea plicata v. pacijica Miill. Arg., olivaceo-virens et 

 pendula, rami majores visi 1 — 1V B mm. crassi, compresso-teretes, 

 articulati, polito-laeves, elongati, sparse suborbiculari- et linearil 

 sorediosi et hinc inde fasciculatim setuligero-isidioidei, superne 

 hinc inde subfasciculatim v. nidulatim ramuligeri; ramilli 3 — 8 

 mm. longi et lueves; apothecia ignota. — Inter U. plicatam et 

 ejusdem var. ariiculatam (Um. articulatam Auct.) habitu fere me- 

 dium tenens, at ramificatione ultima fasciculata ad Usn* plicatam 

 v ¥ nidificam (i. e. Usn. nidificam Tayl, in Hook. Lond. Journ, of 

 Bot. 1847 p, 191) accedens. — In insula Oceani Pacifici Otahiti : 

 G, Brunaud. 



806. Stereocaubn confluens Mull. Arg., podetia 1 — 2-pollicaria, 

 gracilia, vix ultra 1 mm. crassa, superne parce ramosa, visa 

 praeter trientem superiorem in terram defossa et sirnul phyllo- 

 cladiis paucis elongatis rhizinoideis praedita, caeterum nuda et 

 glabra, pallida, superne granulis paucis solitariis albidis exi- 

 guis subnoduloso-angulosis sessilibus adspersa et aliis in ramillos 

 latiuscule foliaceo-confluentibus praedifca; ramilli obconici, bre- 

 ves, crassiusculi, margine subundulati et multicrenati ; apothecia 

 */ $ — I /s m| P* l &ta > ^ a ^ e turbinata, e concavo mox planiuscula, 

 e fusco nigricantia, tenuiter biatorino-marginata ; epithecium 

 olivaceo - fuscum, lamina caeterum cum hypothecio hyalina; 

 sporae in ascis leviter spirales, liberae leviter sigmoideae, circ. 

 38—45 fi longae et 2 1 / 7 — 3*/a ft latae, anguste fusiformes, 4-lo- 



