Macbride — Further Notes on the Boraginaceae 21 
Onosmodium longiflorum (D. Don), comb. nov. Macromeria 
longiflora D. Don, Edinb. N. Phil. Journ. xiii. 239 (1832). 
ONOSMODIUM noahenbacdogs (D. Don) Macbr., var. hispidum 
(Mart. & Gal.), comb. nov. Macromeria hispida Mart. & Gal. 
Bull. Acad. Brux. xi. pt. 2, 339 (1844). M. wi D. Don, 
var. hispida (Mart. & Ga 1) A. DC. Prod. x. 68 (1846). 
Onosmodium unicum, spec. nov., ut videtur 4-5 dm. altum; 
caule ad apicem ramoso pilis adpresse crispeque et cum no onnullis 
pilis longioribus firmiusculis intermixtis; foliis radicalibus ignotis 
caulinis oblongo-lanceolatis basi et apice acutis circa 5 cm. longis 
1.5-1.8 em. latis supra viridibus parce papilloso-hispidis et minute 
ea Sas ae pallidioribus 3-5 nerviis strigillosis et imprimis 
e hispidis, foliis superioribus gradatim pepe 
dancinie Bab Visco athineds et -hispidis; corolla cirea 12 m 
longa, tubo (ut videtur flavo) extus parce villoso, intus eee: 
cs (ut videtur viridibus) corollae anguste ovato-acuminatis ad 
m plus minusve recurvatis extus adpresse strigosis fere 4 m 
apic 
toitiie: antheris 2.5 mm. longis apiculatis ; stylo exserto; a a 
lobis inaequalibus fere linearibus circa 8 mm. longis; ase acute 
fere rotundis circa 4 mm. longis nitidis laevissimis. — MrExico: 
Alvarez, San Luis "Potaa, July 13-23, 1904, Palmer, no. 185 (Typr, 
Gray Herb.). 
This very unique species is related to the Texan O. bejariense 
DC. which has extremely hispid stems and calyces, the long hairs 
widely spreading, and is not at all viscid. 
Onosmodium revolutum (Robinson), comb. nov. Lithosper- 
mum revolutum Robinson, Proc. Am. Acad. xxvii. 182 (1892). 
This very distinctive plant is a better Onosmodium it seems to 
me than a Lithospermum. Since the discovery of the Mexican 
species L. Palmeri and L. oblongifolium, both with the aspect of 
Onosmodium and with nearly the corolla of that genus, the diffi- 
culty of defining in good contrast these genera has been greatly 
increased. The above species, which may be said to be on the 
border-line between the genera possess, however, very rounded 
corolla-lobes which are somewhat spreading. This character is 
peculiar to Lithospermum. But the corolla of L. revolutum has 
erect lobes that are acute or at least acutish and moreover the 
limb is entirely without appendages of any sort; they are usually 
present in some degree in Lithospermum. L. strictum Lehm. 
(under which name L. revolutum was first distributed) is aberrant 
in Lithospermum because it has the tubular corolla of Onosmodium 
