Sartonia.] 



LOASE^. 



221 



correctly remarks) a solitary female flower. The tube of the calyx is incorporated with the corolla, and the 

 seg^meuts resemble slender and rather long bristles, set ou to the corolla, and alternating with its segments. 

 I have received the same plant from Dr. Torrey, gathered near New York, ^i-ithout a name. The flowers 

 being in racemes, this plant would, I think, rank more naturally with Sicj/os than with Momordica. But 

 with the fruit lam unacquainted; and it must be confessed that the genera of Cucurbitacece are very im- 

 perfectly defined. 



Ord. XXXVI. LOASEiE. Juss. 



1. BARTONIA. Nutt. et PursJi. 



Calycis tubus cylindraceus arete ovarium vestiens, sed forsan liber; llmhus 5-partitus per- 

 sistens. Petala 10 unguiculata calyce inserta. Stam, innumera (200-250) cum petalis 

 inserta, iis breviora, filamentis llberis, externis interdum sterilibus, antheris oblongjs. 

 Stylus filiformis striis 3-7 spiralibus notatus et inde stylis 5-7 omnlnu connexis et spiraliter 

 tortis constans. Capsula oblonga 1-locul. 3-7-valvis, placentis totidem seminum series 

 2 gerentibus. Semina compressa numerosa. — Herbae pills barhatis rigidulis tenacibusqne 

 pubescentes. Folia alterna interrupte pinnatifida. Flores terminales solitarii ampli albi stth 

 vesperem expansi, DC. 



1. B. IcEvicaulis; petalis 5, staminibus 5 petaloideis, bracteis nullisj caule Isevissimo, 

 3eminibus alatis, . (Tab. LXIX.) — Douglas, MSS, apud Hort. Soc. hond. 



CauHs herbaceus, annuus, erectus, 2--3-pedalis, ramosus, Ifevis, albidus, subnitidus. Folia lanceolata, 

 sinuato-pinnatifida, sessiHa; inferiora Vdsvinscnla, ; svperiora sensim minora scaberrima. Flores terminales, 

 subcongesti, raagni, speciosi, " uitidi, flavi." JBractecB nulhe, nisi folia suprema parva, integenima. Calycis 

 segmenta lanceolata-aoumiuata, longa, demum reflexa, extus scabra, iutus glaberrlma; tubo apice libero, 

 Petala 5, erecto-pateutia, 2^uncialia, lauceolata, basi apiceque acuminata. Stamina numerosa, petalis 

 breviora : ^/awe«ffl! 5 exteriora latiora, subpetaloidea ; re//y?/« filiformia, glabra. Anther^B ohlongve, bilocu- 

 lares. Germen inferum, subcampanulato-cylindraceum, asperom, obscure 5-sulcatum. Stylus longitudine 

 staminuni, filiformis, versus apjcem obscure 3-lineatus. Stigma obtusum. " Capsidu scabra, glutinosa, 

 3-valvis. Semina alata, alba." (^Dougl.) 



Hab. On the gravelly islands and rocky shores of the Columbia, near the " Great Falls;" flowering 

 in June and July. Douglas. — This is a very beautiful addition to the American Flora, scarcely at all inferior 

 to the B. ornata of Pursh and Nuttall, (B. decapetalay Sims in Bot. Mag. t. 1487,) which Mr. Le^-is and 

 Mr. Nuttall found on the borders of the Missouri, and which the latter author has so well described in his 

 valuable " Genera of North American Plants." From it our plant differs remarkably in the absence of 

 the large, foUaceous, deeply pinuatifid, and laciniated bractea?, iu its fewer petals, and winged seeds. Con- 

 trary to the habit of B. ornata^ this and the following species never expand their blossoms in the evening, 

 but during the bright sunshine. 



Tab, LXIX. Bartonia laevicaulis. Fig. 1, Lower leaf: — natural size; Jig. 2, Stamen; Jig. 3, Outer 

 petaloid stamen j Jig. 4, Calyx and pistil : — maymjied, 



2. B, parviflora; petalis 5, staminibus 5-7 petaloideis, bracteis nullis, caule scabro, 

 seminibus alatis. — Douglas, MSS. apud Hort. Soc, Land, 



Hab. Abundant on calcareous rocky situations and micaceous sandy banks of streams, in the interior 

 parts of the Columbia. Douglas. — Tlie only specimen I have seen of this is in the Herbarium of Professor 

 Lindley. The flowers are certainly somewhat smaller than iu the preceding species, and the stem and 



