336 WILSON EXPEDITION TO CHINA 



INDIA. Sikkim: "reg. subtrop. alt. 4-6000 ped.," J. D. Hooker (type; 

 " Rhynchospermum 5, Herb. Ind. Or. Hook. f. et T.")- 



The co-type of this species in the Gray Herbarium agrees well with the Chinese 

 specimens mentioned above, but it is strange that Hooker in his description says : 

 " ovar3' pubescent, foUicles tomentose," while in all the specimens before me there is 

 not the sUghtest indication of any pubescence on the ovaries or fruits. It might be 

 possible that there are two different plants mixed under the type specimens, or it 

 was a mistake of Hooker's, who also describes the mouth and throat of the corolla 

 as glabrous, while in the specimens before me both are distinctly pubescent. I 

 suggest that the fruits described by Hooker do not belong to a Trachelospermum at 

 all. See also my remarks under subgen. Axillanthus. 



CLAVIS SPECIERUM GENERIS TRACHELOSPERMI.i 



Ovarium fructusque glaberrimus. Squamae calycis distincti, 10 (v. plures?), 2 

 ante segmentum quodque insertae. 

 Tubus corollae apice dilatatus; stamina in parte dilatata inserta; styli elongati. 

 Valvae fructuum (an semper?) tenues. 



Subgen. 1. EUTRACHELOSPERMUM. 

 Alabastra satis longe acuminata, parte loborum convolutorum quam pars 

 superior dilatata tubi plus minusve duplo longiore. Antherae e fauce 

 glabra paulo exsertae. 

 Sepala circiter 3.5 mm. longa, apice plus minusve patula. 



Corollae tubus circiter 8-9 mm. longus. Foha vix ad 9 cm. longa et 3.5 cm. 

 lata 1. r. divaricatum. 



1 As is the case with many other genera of the Apocynaceae it is very difficult 

 to limit properly the genus Trachelospermum. After a careful examination of all 

 the material at my disposition and of the description given by authors I think it 

 best not to include the following plants referred to this genus : 



1. T. difforme Gray, Syn. Fl. N. Am. II. pt. 1, 85 (1878), and the apparently 

 very different T. stans Gray in Proc. Am. Acad. XXI. 394 (1886) (see the specimens 

 collected by E. Palmer, No. 724, at Chapala in 1886, and of C. G. Pringle, No. 8743, 

 at Monterey, Mexico, 1903). Both may be kept in the genus Secondatia A. DC 



2. T. verrucosa Boerlage, Handl. Fl. Nederl. Ind. II. 400 (1899), which is the 

 same as Triadenia verrucosa Miquel, Fl. Ind. Bat. II. 459 (1856) and referred to 

 our genus by Bentham & Hooker. I have not seen a specimen. 



3. T. Bowringii Hemsley in Jour. Linn. Soc. XXVI. 99 (1889), which was first 

 described as Parechites Bowringii Hance in Jour. Bot. VI. 299 (1868). I know 

 this plant only from Hance's description, according to which, if correct, I do not 

 believe that the plant is a Trachelospermum in our sense. 



4. T. philippinense Elmer in Leafl. Philipp. Bot. II. 488 (1908), of which I have 

 seen the type (A. D. E. Elmer, No. 9135, Lukban, 1907). The author says " near to 

 T. fragrans Hook, f.," but, as he states himself, the very short corolla-lobes are 

 " slightly twisted to the right in the bud, but reflexed to the left in the anthesis." 

 Besides this there are only five scales of the calyx and the inflorescence is different. 

 It certainly has no relationship with T. fragrans or any other Trachelospermum. 



5. T. Cavaleriei Leveille, Fl. Kouy-Tcheou, 31 (1912), of which I saw some leaves, 

 is no Trachelospermum. T. Esquirolii Leveille, 1. c. 32, is a Melodinus, near to 

 M. monogynus. T. Navillei L6veill6, 1. c, is the same as Aganosma cymosum, 

 var. elegans Hooker f. 



