BORAGE FAMILY 195 



Dorsal faces of the nutlets inside the ring large; lower prickles inserted 

 near the base of the nutlets; stem hirsute. 

 Prickles terete; plant green; corolla blue. 19. L. occidentalis. 



Prickles flattened and dilated at the base; plant whitish long-hairy 

 below; corolla white. 20. L. leucotricha. 



The annular margin connecting the bases of the prickles at least in three of the nut- 

 lets broadened and forming a cup. 

 Plant at flowering time with a large basal rosett&of spatulate leaves; stems simple 

 up to the inflorescence, softly pilose. 

 Stems several from the rosette, low, 1-2 dm. high; cup deep and much Inflated. 



21. L. collina. 

 Stems solitary, 3-4 dm. high; cup rather shallow and slightly gibbous. 



22. L. cupulata. 

 Plant at flowering time without a basal rosette, diffusely branched, hirsute, green. 



Cup deep, more or less saccate. 23. L. heterosperma. 



Cup shallow, with revolute margins. 24. L. foliosa. 



5. ASPERO'GO (Tourn.) L. Catchweed, German Madwobt. 



1. A. procumbens. 



6. ERITRICHIUM Schrader. 



Dorsal surface of the nutlets margined with a ridge-Uke ring, but not toothed. 



Plant strigose; dorsal surface of the nutlets papillose-hispid; coroUa 7-9 mm. wide. 



1. E. Howardii. 

 Basal leaves with long loose pubescence; dorsal surface of the nutlets smooth; corolla 

 5-6 mm. wide. 2. E. elongatum. 



Dorsal surface of the nutlets with a toothed border; coroUa 4-6 mm. wide. 



3. E. argenteum. 



7. GREENEOCHARIS Guerke & Harms. 1. G. circumsctssa. 



8. PLAGIOBOTHRYS Pisoh. & Mey. Popcorn Flower. 



Receptacle subglobose or depressed, not 4-sulcate; nutlets only 1 or 2 maturing, hori- 

 zontally incumbent; plants with tufted basal leaves. 

 Nutlets cruciform; basal leaves rosulate; cauline few and small. 1. P. tenellus. 



Nutlets broadly ovate; stems leafy throughout. 2. P. arizonicus. 



Receptacle deeply 4-sulcate, after the falling of the nutlets; nutlets all 4 maturing, in- 

 curved. 3. P. Kingii. 



9. EREMOCARYA Greene. 



Nutlets smooth and shining. 1. E. micrantha. 



Nutlets finely miiricate, dull. 2. E. muricata. 



10. OREOCARYA Greene. 



Corolla-tube not exserted. 



Pruit depressed; nutlets smooth, at the margins separated by an open space; caules- 

 cent cespitose perennials. 

 Leaves canescent. 



Nutlets all maturing. 



Leaves appressed-canesceut, not hispid; corolla 5-7 mm. wide. 



1. O. cinerea. 

 Leaves with the fine pubescence intermixed with hispid hairs on the lower 



surface; corolla less than 5 mm. wide.- 

 Plant low, grayish, not yellowish hispid above; racemes short, 2-ranked. 



2. O. suffruticosa. 

 Plant tall, yellowish hispid above; racemes in fruit elongate, l-ranked. 



3. O. muUicaulis. 

 Nutlets only one maturing, three abortive. 4. O. disiicha. 



Leaves green, having scattered short hairs with pustulate bases above, glabrous 

 beneath., 5. O. pustulosa. 



Fruit conical or ovoid; nutlets touching each other. 



Floral leaves long, many times longer than the flower-clusters; inflorescence 

 spike-like; biennials or short-lived perennials. 

 Nutlets transversely rugose. 6. O. virgata. 



Nutlets smooth. 7. O. spicata. 



Floral leaves comparatively short, little if at all surpassing the flower-clusters. 

 Nutlets rough. 



Nutlets decidedly wing-margined. 



Branches of the inflorescence appressed, erect, in fruit elongate; nut- 

 lets merely muricate on the back. 8. O. setosissima. 

 Branches of the inflorescence spreading; nutlets rugose as well as muri- 

 cate on the back. 11. O, virginensis. 

 Nutlets acute-margined, not winged. 



Calyx-lobes ovate-lanceolate, only slightly exceeding the mature nut- 

 lets; inflorescence paniculate, with rather few branches; caules- 

 cent perennials, often cespitose. 

 Corolla 7-8 mm. broad; nutlets muricate and cross-ribbed, but 



not honeycomb-crested. 9. O. data. 



CoroUa 4-5 mm. broad ; nutlets honeycomb-crested. 



10. O. Bakeri. 

 Calyx-lobes lanceloate to Uuear, much exceeding the nutlets; inflor- 

 escence thyrsoid. 



