464 ADDITIONS AND CORRECTIONS TO VOL. I. 



late leaves and duU-coloreel fragrant flowers: peduncles umbellately several- many- 



tlowered. 



An Anierieau genus of about 30 species, iuliabiting tropical and subtroi)ical regions from the 

 southern border of the United States to IJuenos Ayres. Five species are included in Gray's 

 Synoptical Flora. Formerly included iu Sarcoslcmnui, which is restricted by Bentham k. Hooker 

 to tlie Old World species. 



1. P. linearis, Benth. «t Hook. Slender, low-twining or when young erect, 

 puberulent or ghilirate : leaves narrowly linear, acute or acutish at each end, an inch 

 long, shortly petioled : peduncle 8- lO-Howered, exceeding the leaves: corolla slightly 

 puberulent, with ovate lobes, yellowish, purplish, or wliitisli, 4 lines broad ; crowns 

 contiguous : column none or very sliort. — Gray, Syn. Fl. ii. 88. Sarcustemina 

 lineare, Decaisne, PI. Hartw. 25, and DC. Prodr. viii. 539. 



Var. hirtella, Oray, 1. c. Cinereous-pubescent throughout with short spreading 

 hairs, slightly climbing : sepals more slender. — Sarcostemma heterophiflliim, var. 

 hirtelhim, Gray, Bot. CaHf. i. 478. 



Var. heterophylla, Gray. — Sarcostemma heterophyllum, Engelm. 



The varieties from Soutliern California to Arizona ; the typical form Mexican ranging into 

 Arizona. 



4. GONOLOBUS, Michx. 



The American species of Lacluwstoma are now referred by Dr. Gray to this genus, 

 which differs from our other Asclepiadacece in its unappendaged anthers borne on or 

 under the margin of the stigma and dehiscing transversely, the pollen masses hori- 

 zontal or nearly so. — Perennial twiners, with opposite leaves and umbellate or fas- 

 cicled dull-colored flowers. — Gray, Proc. Amer. Acad. xii. 75, and Syn. Fl. ii. 102. 



About 80 or 90 species all American, 15 in the southern United States. . 



1. Gr. hastulatUS, Gray, 1. c. — Lachnostuma hastulaliim, Gray, Bot. Calif. 

 i. 620. 



Page 479. ERYTHR-EA. 



2. E. trichantha, Griseb. Santa Cataliua Island, Dr. Schumacher. 

 Page 483. 3. GENTIANA. 



7*. Gr. Oregana, Engelm. leather stout, 1 or 2 feet higli : leaves ovate or ovate- 

 oblong, 1 to 1 ^ inches high : flowers few at the summit or occasionally several and 

 racemosely scattered : bracts oblong or ovate : calyx-lobes oblong- to ovate-lanceo- 

 late, equalling the tube : corolla broadly funnelforra, over an inch long, with short 

 roundish lobes. — Gray, Syn. Fl. ii, 122. G. affinis, var. ovata, Gray, page 482. 



From near San Francisco {liolandcr) to IJritish Columbia. 



Page 484. 4. FRASERA. 



4. F. albicaulis, Dougl. Very minutely pruinose-puberulent : sepals rather 

 longer and narrower than in F. nitida : corolla lobes ovate-lanceolate and acuminate : 

 gland oblong-linear : scales between the filaments more or less dissected into bristle- 

 like processes : otherwise as F. nitida. — Griseb. in Hook. Fl. Bor.-Am. ii. 67, t. 164; 

 Gray, Syn. Fl. ii. 126. 



Near Fort Bid well, Modoc County (Dr. IF. Madhcivs) ; northward in Oregon and Idaho. 



Page 486. 1. PHLOX. 



2. P. longifolia, Nutt., var. brevifolia. Gray. Substitute for var. Stans- 

 buryi, which is a stouter form with linear to linear-lanceolate leaves, occurring fre- 

 quently in Nevada and Utah, but not yet observed in California. 



