no 



KEY TO THE FAMILIES AND GENERA 



Subthbe 4. Lamieat. 



A. The posUTior lip of oorolhi often short or flat, „ , . 



Rlabmua or puln-scH'tit , -So. Colquhottma. 



AA. The ix»^terior hp (x>iicavo or foroicatei rarely 

 tiattish, usually villous. 

 B. Teeth of calyx 1.-13, rarely 5. 



c CaljT very l)n>ail at apex 26. MotHccHla. 



<x. CaljT long-tubular 27. Leonolxs. 



BB. Teeth of oalj-x .'>. 



c Stamens often cast to one aide after 



antheais 2S. Stachys. 



cc. Stamens often hairy on the back of the 



anthers .■ ■ ■ ■ ■,■ ■ 29- l-ammm. 



ccc. Stamens often have the posterior fila- 

 ments appendaged at the base 30. I'hlomis. 



8. Satureia Tribe. 



Subtribe 1. Pogostemonese. 



Calyi. 5-toothcd; corolla 4-cut: anterior lobes 



usually wider spreading 31. Pogostemon. 



Subtribe 2. Menthoideffi. 



A. Whorls spicate or racemose, not axillary. 

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



whorls many-fld 32. ElshoUzui. 



BB. Calyx subequal in anthesis, but declinate 

 and bilabiate in f r. ; whorls 2-fid. 



c. .\utlcts smooth 33. CoUinsonia. 



cc. Nutlets netted-veined 34. Peritla. 



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

 tha, crowded in a den.se terminal spike). 



B. Perfect stamens 4 35. Mentha. 



BB. Perfect stamens 2 36. Cumla. 



AAA. Whorls in dense heads surrounded by involu- 

 cral bracts. 

 B. Corolla sub-bilabiate; whorls densely many- 

 fld. 

 c. I.obes of corolla ovate; heads often corym- 



bo.se-panicled 37. Pycnanthe- 



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



globo.ie, solitary 38. Monardella. 



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

 heads solitary, crowded or corymbose 



panicled 39. Origanum. 



AAAA. Whorls few-fid., axillary or the upper ones 



spicate; calyx-throat clo.sed by villous hairs. 40. Thymus. 

 AAA-lA. Whorls axillary or the highest spicate; calyx 

 open-bcll-shaped, equal. 



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



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



Subtribe 3. Melisseae. 



A. Posterior lip of corolla concave, sickle-shape 



or galeate 43. Acanlho- 



AA. Posterior Up of corolla flattish or slightly con- [mintlia. 



cave. 

 B. Calyx distinctly 2-lipped. 



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

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



ascending 45. Melissa. 



BB. Calyx equal or sub-bilabiate. 



c. Perfect stamens 4 46. Micromeria. 



cc. Perfect stamens 2 47. Hedeoma. 



Other genera treated are: Eremostachys, Galeopsis. Pycnos- 

 tachys, Sideritis, Synandra and Tinnea. 



144. PLANTAGINACEiE. 



One genus in cultivation Plantago. 



145. NYCTAGINACEjE. 



A. Fla. involucrate. 

 B. Stigma with a small head; anthers didyna- 



uious 1. Mirahihs. 



BB. Stigma linear: anthers not didynamous 2. Abronia. 



jL. Fls. not involucrate, but bracted. 



B. Bracts large, colored 3. Bttugain- 



[ptllea, 

 BB. Bracts very small 4. Pitonia. 



146. AMARANTACE.*. 



A Anthers 2-cclled. 

 B. Ovary 2-ovuled. 



c. Fr. a utricle 1. Celosia. 



cc. Fr. berry-like 2. Deeringia. 



BB. Ovary 1-ovuled. 



c. Ovule erect, with a short funiculus. 



D. Segms. of i>erianth stellate in fr. : fls. in 



terminal rnrcmes: shrubs. . 3. Bosea. 



DD. SeRins. of poriaiitli upright in fr. : fls. in 



clusters or paiiirles: herbs 4. Amarantua. 



cc. Ovule suspi-M^i-'il Irom the apex of an 

 elongated funiculus. 

 D. Pcriiuith-s^'unis. scarious at apex, con- 

 nate !tt ttiiso 5. Trichinium. 



DD. Peniuitli-scgms. hyaline, membranous 



or somewhat papery, lauate 6. ^rva. 



AA. Anthers 1-celled. 



B. Fls. minute in glomerules or little-spiked 



along the sparse branches of the panicle . . 7. Iresine. 

 BB. Fls. in heads or spikes rarely panicled. 

 c. Stigmas 2. 



D. Pcrianth-segms. free or connate at base. 8. Gomphrena 

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



in fr 9. Frmlichia. 



CC. Stigma simple. 



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

 ther-bearing awl-shaped lacinite and 



5 antherless lacinite interposed 10. Teianthera. 



DD. Staminal tubes with no antherless 



lacinife interposed ; 11. PJaffia. 



147. CHENOPODIACE.E. 



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

 the perianth at the base, or higher. 

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

 BB. Embryo .semi-annular: filaments recurved at 



apox or lower in the bud 2. Bouasin- 



Aj^. Fls. with bractlets not adnate to perianth. IgauUia. 



B. Embryo spiral: endosperm scant or 3. SaUola, 



BB. Embryo ring-shaped or horseshoe-shaped: 

 endosperm copious. (Salicornia has con- 

 duplicate embryo and no endosperm.) 

 c. St. and branches articulated: fla. im- 

 mersed in caves in the superposed 



joints: no foliage-lvs 4. Salicornia. 



cc. St. not articulated. 



D. Perianths heteromorphous; starainate 

 without bracts, 3-5-lobed 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. vrithout perianth, 3-4- 



toothed 5. Spinada. 



EE. Pistillate fla. with ample bracts which 



enlarge in fr. ; perianth 6. Atriplez. 



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, 



bony 8. Cycloloma. 



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 10. Beta. 



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



148. PHYTOLACCACEiE. 



A. Ovary superior. , „. . 



B. Carpel 1 1- 5""»- 



BB. Carpels 2-o=, united into a berry 2. Phytolacca. 



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



^op 3. Peliieria. 



AA. Ovary semi-inferior: fr. inferior 4. Agdestia. 



149. POLYGONACE.ffi. 



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-e-lobed 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- {beckui. 



like tube, including the nut and often ad- 

 nate to it, crowned by the unchanged 

 connivent or marcescent Umb 2. Coccolooa. 



