116 



KEY TO THE FAMILIES AND GENERA 



Subtribe 4. Lamiea 



A. The posterior lip of corolla often short or flat, 



glabrous or pubescent 25. Colquhounia. 



AA. The posterior lip concave or fornicate, rarely 



flattish, usually villous. 

 B. Teeth of calyx 0-13, rarely 5. 



c. Calyx very broad at apex 26. Moluccella. 



cc. Calyx long-tubular 27. Leonotis. 



BB. Teeth of calyx 5. 



c. Stamens often cast to one side after 



anthesis 28. Stachys. 



cc. stamens often hairy on the back of the 



anthers 29. Lamium. 



ccc. stamens often have the posterior fila- 

 ments appendaged at the base 30. Phloma. 



8. Satureia Tribe. 

 Subtribe 1. Pogostemoneae. 



Calyx, 5-toothed; corolla 4-cut; anterior lobes 



usually wider spreading 31 . Pogostemon. 



Subtribe 2. Menthoidese. 



A. Whorls spicate or racemose, not axillary. 

 B. Calyx equal, erect, often elongated in fr.; 



whorls many-fld 32. Elshollzia. 



BB. Calyx subequal in anthesis, but declinate 

 and bilabiate in fr. ; whorls 2-fld 



c. Nutlets smooth 33. Collinsmia. 



cc. Nutlets netted-vemed 34. Peritta. 



AA. Whorls axillary (or, in a few species of Men- 



tha, crowded in a dense terminal spike). 

 B. Perfect stamens 4 35. Mentha. 



BB l er f ect 8 i amens 2 -; 36. Cunila. 



AAA. Whorls in dense heads surrounded by involu- 



cral bracts. 



B. Corolla sub-bilabiate; whorls densely many- 

 fld. 

 c. Lobes of corolla ovate; heads often corym- 



bpse-panicled 37. p ycn anlhe- 



cc. Lobes of corolla oblong or linear; heads [mum. 



globose, solitary 38. Monardella. 



BB. Corolla bilabiate; whorls 2-fld., rarely more; 

 heads solitary, crowded or corymbose 



AAAA. wK'few-fld:.' axillary'or 'the upper' ones 39 ' On <" mum ' 

 spicate ; calyx-throat closed by villous hairs . 40. Thymus. 



AAAAA. Whorls axillary or the highest spicate ; calyx 

 open-bell-shaped, equal. 



B. Calyx 10-nerved; stamens ascending 41. Satureia. 



BB. Calyx 15-nerved; stamens divergent 42. Hyssopus. 



Subtribe 3. Melisseie. 

 A. Posterior lip of corolla concave, sickle-shape 



AA. Posterior lip of corolla flattish or slightly con- ' " ImMha 



cave. 

 B. Calyx distinctly 2-lippcd. 



c. Corolla-tube straight or slightly curved ... 44. Satureia S 

 cc. Corolla-tube below the middle recurved- [Calamintha 



ascending 45. Melissa. 



BB. Calyx equal or sub-bilabiate. 



c. Perfect stamens 4 46 . Micromeria. 



cc. Perfect stamens 2 47. Hedeoma. 



t the <,.ipner a treated are: Eremostachys, Galeopsis, Pycnos- 

 tachys, Sidentis, Synandra and Tinnea. 



144. PLANTAGINACE^E. 



One genus in cultivation Plantago. 



145. NYCTAGINACE.E. 



A. Fls. involucrate. 

 B. Stigma with a small head; anthers didyna- 



BB. Stigma linear; anthers not didynamous. '.'.'.'. 2. Abronia. ' 

 AA. Fls. not involucrate, but bracted. 



B. Bracts large, colored 3. Bougain- 



BB. Bracts very small . . 4. Pi^! 



146. AMARANTACE.E. 



A Anthers 2-celled. 

 B. Ovary 2-ovuled. 



c. Fr. a utricle 



cc. Fr. berry-like 



BB. Ovary 1-ovuled. 



c. Ovule erect, with a short funiculus. 



D. Segms. of perianth stellate in fr.: fls. in 



terminal racemes: shrubs 3 



DD. Segms. of perianth upright in fr.: fls. in 



clusters or panicles: herbs. 4 



cc. Ovule suspended from the apex of 'an 



elongated funiculus. 



D. Perianth-segms. scarious at apex, con- 

 nate at base 5 



DD. Perianth-segms. hyaline, membranous 



or somewhat papery, lanate 6 



AA. Anthers 1-celled. 



B. Fls. minute in glomerules or little-spiked 



along the sparse branches of the panicle.. 7 

 BB. * Is. m heads or spikes rarely panicled. 

 c. Stigmas 2. 



D. Perianth-segms. free or connate at base 8 

 DD. Perianth-tube 5-cut, cristate or winged 



in fr 9 



cc. Stigma simple. 



D. Staminal tube short or long, with 5 an- 

 ther-bearing awl-shaped lacinise and 



5 antherless lacinise interposed 10 



DD. Staminal tubes with no antherless 

 lacinise interposed 



Bosea. 

 Amarantua. 



Trichinium. 

 &rva. 



Iresine. 



Gomphrena. 

 Fralichia. 



Telanthera. 

 Pfaffia. 



1. Celosia. 



2. Deeringia. 



147. CHENOPODIACE^I. 



A. Fls. with 4 bractlets, 2 of which are adnate to 



the perianth at the base, or higher. 



B. Embryo spiral : filaments straight in the bud. 1. BaseUa. 

 BB. Embryo semi-annular: filaments recurved at 



apex or lower in the bud 2 Boussin- 



AA. Fls. with bractlets not adnate to perianth. (gauUia 



B. Embryo spiral: endosperm scant or 3. Salsola. 



BB. Embryo ring-shaped or horseshoe-shaped: 

 endosperm copious. (Salicornia has con- 

 duplicate embryo and no endosperm.) 

 c. fat. and branches articulated: fls. im- 

 mersed in caves in the superposed 



joints: no foliage-lvs 4 Salirnrnia 



cc. St. not articulated. 



D. Perianths heteromorphous; staminate 

 without bracts, 3-5-Iobed or parted; 

 pistillate usually 0: fls. with 2 bract- 

 lets accrescent in fr. free or connate 

 into a sack, and no perianth. 

 E. Pistillate fls. without perianth, 3-4- 



toothed 5. Spinacia 



EE. Pistillate fls. with ample bracts which 



enlarge in fr. ; perianth 6. Atriplei. 



DD. Perianths homomorphous, i.e., not of 

 two different forms in the same plant. 

 E. Fls. hermaphrodite and feminine, sol- 

 itary or glomerate : seed horizontal; 

 embryo annular; albumen scant.. . . 7. Kochia. 

 EE. Fls. glomerate, hermaphrodite or 

 unisexual: seed erect, inverse or 

 horizontal ; embryo annual or horse- 

 shoe-shaped. 



F. Perianth-tube surrounded by a 

 wing; stamens 5: seed horizontal 



b 9 Q y 8. Cydoloma. 



FF. Perianth 5-parted, usually un- 

 changed in fr. : stamens 1-5: 

 seed erect or horizontal, bony or 



leathery. 9. Chenopod- 



FFF. Perianth 5-lobed, hardened at the [ium 



base in fr.: seed horizontal, 

 leathery JQ. Beta. 



The genus Ullucus, allied to Basella, is also described briefly. 



148. PHYTOLACCACE.E. 



A. Ovary superior. 



B. Carpel 1 t . B ,- M - no . 



BB. Carpels 2- <*> , umted into a berry 2. Phytolacca. 



BBS. Carpels 1 or 2, united, the fr. with scales at 



AA. Ovary semi-inferior: fr. inferior. .... . . . . . . . . 4'. Agdestis. 



149. POLYGONACE-iE. 



A. The fls. fascicled in the axils or at the nodes of 

 infl. (In the first 3 genera sometimes along 

 the rachis of infl.) 

 B. Endosperm 3-6-Iobed with longitudinal 



grooves and usually ruminate, 

 c. Fruiting perianth fleshy or berry-like at 

 the base or everywhere, the nut in- 

 cluded or exserted at the apex 1. Muehlen- 



cc. Fruiting perianth with fleshy or berry- [beckia, 



like tube, including the nut and often ad- 

 nate to it, crowned by the unchanged 

 connivent or marcescent limb 2. Coccolaba. 



