1225 



TRACHYMENE* cgeiulea. 

 Blue-flowered Trachymene. 



PENTANDRIA DIGYNIA. 



Nat. ord. Umbellifer^. § Hydrocotylinece. 



TRACHYMENE Rudge. — Polachenium opposite valde compressum, 

 utrinque sed basi prsecipue emarginatum, didymum, calyculo stylisque coro- 

 natum. Achenia subrotunda, compressissima, qiiinquecostata, costis capil- 

 laribus curvilineis ; marginalibus brevioribus rectilineis. Commissura clausa, 

 angustissima. Corolla subsequalis. Petala integra, absque acumine, ex- 



trorsilm latiora, sessilia (sestivatione vald^ imbricata). Umbellse peduncu- 



latcB, axillares, terminalesve, simplices, multiflorce, pedicellis interioribus 

 sensim brevioribus, involucratcB. Involucra. poly phylla,foliola basi in urceolum 

 connata, et pedicellis adpressa. Stamina corolld longiora. Styli subulati, 

 divergentes, longi. Stigmata simplicia, obtusiuscula. Discus bilobus, mem- 

 branaceus, concavus, subcrenatus. Achenia tuberculis minutis ad lentem 

 muriculata, alterum scepe abortivum. Folia petiolata, alterna, tripartito- 

 multijida. — La Gasca MS. ad Tr. incisani. 



T. ccBrulea ; pilosa, foliis radicalibus tripartitis, laciniis trilobis incisis : 

 superioribus sessilibus tripartitis, petalis obtusis, fructibus glabris. 



T. caerulea. Graham in Edinb. new phil.journ. 1828, p. 380. 



Didiscus caeruleus. Dec. MS. Hooker in bot. mag. fol. 2875. 



Obs. Fructus certe evittatus. Ovarium loculo altero scepiils abortiente. 



Pericarpium chartaceum v. potiils submembranaceum. Staminum supremum 



ascendens, inferiora declinata, omnia cito caduca. 



This beautiful New Holland annual has only been seen 

 in our Gardens during one season. It first presented itself 

 to our notice in the Garden of the Horticultural Society in 

 August last, having been raised in that Collection from 

 seeds received the previous spring from Mr. Charles Frazer, 

 of Sydney in New South Wales. We have subsequently 

 heard of it in other Collections in this country; and 

 M. Decandolle informs us, that it is also growing in the 

 Geneva Garden. It is a half-hardy annual, flowering in 



* So called from r^i^xv?, rough, and f^m, a membrane ; in allusion to 

 the coat of the fruit. 



