APPENDIX. XXIU 



Rhodanthe, now so common, and several unpublished plants, 

 of new genera, the more remarkable of which are the fol- 

 lowing ; viz. Laurrencella rosea,^^ a most beautiful annual, re- 

 sembling Hhodanthc, but handsomer, and differing in the 

 achaenia being covered with long clavate glands, and in the 

 pappus not being plumose ; from the greater part of the allies 

 of lihodanthe it is distinguished by the pappus being in many- 

 rows ; Xyridanthe^^^ another genus near RhodantJie, from 

 whicli it differs in the pappus being paleaceous and plumose, 

 not setose : the species are annuals of no beauty ; and Pltho- 

 carpa,^^ a very curious genus, of which there are two rather 

 pretty species ; it is near Humea in character, but entirely 

 different in habit. To these has to be added Rhytidantlie 

 and IxiolcBna, Benth., genera with which I am unacquainted. 



('''') Lavvrencella (Helichryseae), Capit. multiflorum homogamum. Involucrum 

 hemispheericum, imbricatum ; squamls exterioribus herbaceis sphacelatis iti- 

 tcrioribus petaloideis radiantibus. Receptaculum planum nudum. Cor. 5- 

 dentatae. Antherse ecaudatse. Stigmata conica dorso glandulosa. Achasnia 

 erostria, compressa, glandulosa. Pappus multiserialis, setosus, sequalis; 



setis serratis. Antherae certe ecaudatae et basi rotundatce, sed fills qui- 



busdam arachnoideis tenuissimis loco caudce colligatse. 

 Lawrencella rosea. Herba annua, glanduloso-subpubescens. Folia opposita 

 et alterna, llnearia, obtusa, indivisa. Pedunculi axillares et terminales, mo- 

 nocephali, lanati. Involucri squamae ext. ovatae, acutae, margine lanatae ; 

 interiores elongatae, apice subdentatae, amoene roseae. 



(95) Xyridanthe (Helichryseae). Capitulum multiflorum homogamum. Invo- 

 lucrum campanulatum, imbricatum; sq. ext. concavis rotundatis subscariosis, 

 interioribus radiantibus apice appendice petaloidea auctis. Receptaculum 

 planum nudum. Cor. 6-dentat8e. Antheree pilis arachnoideis caudatag. 

 Stigmata truncata. Achsenia erostria, lanata. Pappus paleaceus, biserialis, 

 corolla longior ; paleis plumosis. 

 Xyridanthe stricta. Herba annua, glaberrima. Folia alterna, oblongo-lance- 

 olata, membranacea, sessilia. Rami stricti, monocephali, pedunculo om- 

 nino nudo. Capit. 2^ lin. longa, fusca, nitentia, Xyridis capitulum refe- 

 rentia ; squamis oblongis obtusis, interioribus appendice brevi alba radiaiite. 



(9G) PrniocARPA (Helichrysese). Capitulum multiflorum, homogamum. Re- 

 ceptaculum conicum nudum. Involucrum turbinatum, multiseriaie, imbri- 

 catum; squamis exterioribus subulatis, intimis petaloideis radiantibus. Co- 

 rolla tubulosa, 5-dentata. Antherae lana tenui baseos coheerentes. Achas- 

 nium erostre, oblongum, calvum. pubescens. 

 V\i\\Gcs.r\)a, pulchell a. Sesquipedalis, herbacea, lanugine decidua tenui vestita. 

 Cauhs paniculatus parilm ramosus, quasi aphyllus : foliis lineari-lanceolatis 

 sublanatis sessilibus, distantibus. Ramuli 2-3 poll, longi, monocephah, 

 ascendentes, squamis parvis linearibus distantibus vestiti. Involucri basi sub- 

 lanati squamae exteriores purpureo apiculatae, interiores candids, obtusas. 



(97) Pithocarpa corymbulosa ; ramis elongatis apice corymbosis, involucri subla- 

 nati squamis exterioribus scariosis acutis. 



