310 LABIATiE. (mint FAMILY.) 



ovate, coriaceous, indehiscent. Embryo large, naked, gei-minating within the 

 capsule, — Low evergreen trees, with extensively creeping roots, forming impen- 

 etrable thickets on the muddy shores of the sea. Leaves opposite, entire, smooth 

 above, hoary and velvety beneath. Flowers in dense heads, on axillary and 

 terminal peduncles. 



1. A. Oblongifolia, Nutt. ? Tomentose throughout, except the upper 

 surface of the rigid oblong obtuse short-petioled leaves ; peduncles three together, 

 terminal, shorter than the leaves ; heads oval ; sepals and bracts orbicular ; co- 

 rolla tomentose on both sides ; style exseiled. — Key West. Oct. — Branches 

 terete. Leaves 2' -3' long. Peduncles 4-angled. Heads ^' long. Corolla 

 3" long. 



2. A. tomentosa, Jacq. Leaves obovate-elliptical, very obtuse, tapering 

 into a petiole, smooth above, white-tomentose beneath ; spikes short, the lower 

 flowers mostly scattered ; corolla-lobes truncate, silky below, smooth above ; 

 stigma nearly sessile. — South Florida. Nuttall. — Leaves 3' long. Corolla 

 white. 



10. PHBYMA, L. LOP.SEED. 



Calyx tubular, bilabiate ; the upper lip of 3 bristle-pointed teeth ; the lower 

 shorter, 2-cleft. Corolla bilabiate; the upper lip notched, the lower longer, 3- 

 lobed. Stamens 4, didynamous, included. Style slender ; stigma 2-cleft. Fmit 

 oblong, pointed by the persistent style. — A perennial branching pubescent 

 herb, with opposite ovate or oblong coarsely-serrate long-petioled leaves, and 

 small opposite purplish flowers in a slender terminal spike. Fruit reflexed. 



1. P. leptostachya, L. — Rich shaded soil, Florida to Mississippi, and 

 northward. July and Aug. — Stem l°-3° high, tumid above the joints. 

 Leaves 3' -5' long. 



Order 94. LABIATiE. (Mint Family.) 



Herbs or shrubs, with opposite 4-angled branches, and opposite exstip- 

 ulate leaves. Flowers opposite, solitary, or oflener in close axillary spiked 

 or capitate cymes (whorls). Calyx 3- 10-cleft or toothed. Corolla more 

 or less bilabiate, 4 - 5-lobed. Stamens inserted on the tube of the corolla, 

 diandrous or didynamous. Ovary 4-cIeft or 4-parted, the lobes surround- 

 ing the base of the single style. Ovule solitary, erect, anatropous. Fruit 

 of 1 - 4 one-seeded nutlets. Albumen scarce or none. Embryo straight 

 or (in Scutellaria) curved. Radicle short, inferior. — Plants commonly 

 dotted with minute glands, which are filled with an aromatic volatile oil. 



Synopsis. 



Tribe I. OCIMOIDK.^. — Stamens 4, didynamous ; the lower pair longer, reclining on 

 the lower lobe of the corolla. Anthers 2-celled. Nutlets smooth, distinct. 



1. OCIMUM. Upper lobe of the calyx broad, decurrent Lobes of the corolla nearly equal 



2. HYPTIS. Calyx-teeth nearly equal. Lowest lobe of the corolla longest, aaficate, bent 



downward. 



